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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5563 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * |
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| 4 | * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the "Software"), |
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| 8 | * to deal in the Software without restriction, including without limitation |
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| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 11 | * Software is furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included |
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| 14 | * in all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 17 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | * |
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| 24 | * |
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| 25 | * Authors: |
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| 26 | * Brian Paul Keith Whitwell |
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| 27 | */ |
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| 28 | |||
| 29 | |||
| 30 | #if IDX & LIGHT_TWOSIDE |
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| 31 | # define NR_SIDES 2 |
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| 32 | #else |
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| 33 | # define NR_SIDES 1 |
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| 34 | #endif |
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| 35 | |||
| 36 | |||
| 37 | /* define TRACE to trace lighting code */ |
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| 38 | /* #define TRACE 1 */ |
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| 39 | |||
| 40 | /* |
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| 41 | * ctx is the current context |
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| 42 | * VB is the vertex buffer |
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| 43 | * stage is the lighting stage-private data |
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| 44 | * input is the vector of eye or object-space vertex coordinates |
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| 45 | */ |
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| 46 | static void TAG(light_rgba_spec)( struct gl_context *ctx, |
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| 47 | struct vertex_buffer *VB, |
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| 48 | struct tnl_pipeline_stage *stage, |
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| 49 | GLvector4f *input ) |
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| 50 | { |
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| 51 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 52 | GLfloat (*base)[3] = ctx->Light._BaseColor; |
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| 53 | GLfloat sumA[2]; |
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| 54 | GLuint j; |
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| 55 | |||
| 56 | const GLuint vstride = input->stride; |
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| 57 | const GLfloat *vertex = (GLfloat *)input->data; |
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| 58 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 59 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 60 | |||
| 61 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 62 | GLfloat (*Fspec)[4] = (GLfloat (*)[4]) store->LitSecondary[0].data; |
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| 63 | #if IDX & LIGHT_TWOSIDE |
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| 64 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 65 | GLfloat (*Bspec)[4] = (GLfloat (*)[4]) store->LitSecondary[1].data; |
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| 66 | #endif |
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| 67 | |||
| 68 | const GLuint nr = VB->Count; |
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| 69 | |||
| 70 | #ifdef TRACE |
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| 71 | fprintf(stderr, "%s\n", __FUNCTION__ ); |
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| 72 | #endif |
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| 73 | |||
| 74 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
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| 75 | VB->AttribPtr[_TNL_ATTRIB_COLOR1] = &store->LitSecondary[0]; |
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| 76 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 77 | |||
| 78 | #if IDX & LIGHT_TWOSIDE |
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| 79 | VB->BackfaceColorPtr = &store->LitColor[1]; |
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| 80 | VB->BackfaceSecondaryColorPtr = &store->LitSecondary[1]; |
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| 81 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 82 | #endif |
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| 83 | |||
| 84 | |||
| 85 | store->LitColor[0].stride = 16; |
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| 86 | store->LitColor[1].stride = 16; |
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| 87 | |||
| 88 | for (j = 0; j < nr; j++,STRIDE_F(vertex,vstride),STRIDE_F(normal,nstride)) { |
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| 89 | GLfloat sum[2][3], spec[2][3]; |
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| 90 | struct gl_light *light; |
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| 91 | |||
| 92 | #if IDX & LIGHT_MATERIAL |
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| 93 | update_materials( ctx, store ); |
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| 94 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 95 | #if IDX & LIGHT_TWOSIDE |
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| 96 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 97 | #endif |
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| 98 | #endif |
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| 99 | |||
| 100 | COPY_3V(sum[0], base[0]); |
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| 101 | ZERO_3V(spec[0]); |
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| 102 | |||
| 103 | #if IDX & LIGHT_TWOSIDE |
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| 104 | COPY_3V(sum[1], base[1]); |
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| 105 | ZERO_3V(spec[1]); |
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| 106 | #endif |
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| 107 | |||
| 108 | /* Add contribution from each enabled light source */ |
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| 109 | foreach (light, &ctx->Light.EnabledList) { |
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| 110 | GLfloat n_dot_h; |
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| 111 | GLfloat correction; |
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| 112 | GLint side; |
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| 113 | GLfloat contrib[3]; |
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| 114 | GLfloat attenuation; |
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| 115 | GLfloat VP[3]; /* unit vector from vertex to light */ |
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| 116 | GLfloat n_dot_VP; /* n dot VP */ |
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| 117 | GLfloat *h; |
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| 118 | |||
| 119 | /* compute VP and attenuation */ |
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| 120 | if (!(light->_Flags & LIGHT_POSITIONAL)) { |
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| 121 | /* directional light */ |
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| 122 | COPY_3V(VP, light->_VP_inf_norm); |
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| 123 | attenuation = light->_VP_inf_spot_attenuation; |
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| 124 | } |
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| 125 | else { |
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| 126 | GLfloat d; /* distance from vertex to light */ |
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| 127 | |||
| 128 | SUB_3V(VP, light->_Position, vertex); |
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| 129 | |||
| 130 | d = (GLfloat) LEN_3FV( VP ); |
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| 131 | |||
| 132 | if (d > 1e-6) { |
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| 133 | GLfloat invd = 1.0F / d; |
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| 134 | SELF_SCALE_SCALAR_3V(VP, invd); |
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| 135 | } |
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| 136 | |||
| 137 | attenuation = 1.0F / (light->ConstantAttenuation + d * |
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| 138 | (light->LinearAttenuation + d * |
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| 139 | light->QuadraticAttenuation)); |
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| 140 | |||
| 141 | /* spotlight attenuation */ |
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| 142 | if (light->_Flags & LIGHT_SPOT) { |
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| 143 | GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection); |
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| 144 | |||
| 145 | if (PV_dot_dir |
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| 146 | continue; /* this light makes no contribution */ |
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| 147 | } |
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| 148 | else { |
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| 149 | GLfloat spot = powf(PV_dot_dir, light->SpotExponent); |
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| 150 | attenuation *= spot; |
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| 151 | } |
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| 152 | } |
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| 153 | } |
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| 154 | |||
| 155 | if (attenuation < 1e-3) |
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| 156 | continue; /* this light makes no contribution */ |
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| 157 | |||
| 158 | /* Compute dot product or normal and vector from V to light pos */ |
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| 159 | n_dot_VP = DOT3( normal, VP ); |
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| 160 | |||
| 161 | /* Which side gets the diffuse & specular terms? */ |
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| 162 | if (n_dot_VP < 0.0F) { |
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| 163 | ACC_SCALE_SCALAR_3V(sum[0], attenuation, light->_MatAmbient[0]); |
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| 164 | #if IDX & LIGHT_TWOSIDE |
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| 165 | side = 1; |
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| 166 | correction = -1; |
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| 167 | n_dot_VP = -n_dot_VP; |
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| 168 | #else |
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| 169 | continue; |
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| 170 | #endif |
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| 171 | } |
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| 172 | else { |
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| 173 | #if IDX & LIGHT_TWOSIDE |
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| 174 | ACC_SCALE_SCALAR_3V( sum[1], attenuation, light->_MatAmbient[1]); |
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| 175 | #endif |
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| 176 | side = 0; |
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| 177 | correction = 1; |
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| 178 | } |
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| 179 | |||
| 180 | /* diffuse term */ |
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| 181 | COPY_3V(contrib, light->_MatAmbient[side]); |
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| 182 | ACC_SCALE_SCALAR_3V(contrib, n_dot_VP, light->_MatDiffuse[side]); |
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| 183 | ACC_SCALE_SCALAR_3V(sum[side], attenuation, contrib ); |
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| 184 | |||
| 185 | /* specular term - cannibalize VP... */ |
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| 186 | if (ctx->Light.Model.LocalViewer) { |
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| 187 | GLfloat v[3]; |
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| 188 | COPY_3V(v, vertex); |
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| 189 | NORMALIZE_3FV(v); |
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| 190 | SUB_3V(VP, VP, v); /* h = VP + VPe */ |
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| 191 | h = VP; |
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| 192 | NORMALIZE_3FV(h); |
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| 193 | } |
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| 194 | else if (light->_Flags & LIGHT_POSITIONAL) { |
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| 195 | h = VP; |
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| 196 | ACC_3V(h, ctx->_EyeZDir); |
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| 197 | NORMALIZE_3FV(h); |
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| 198 | } |
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| 199 | else { |
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| 200 | h = light->_h_inf_norm; |
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| 201 | } |
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| 202 | |||
| 203 | n_dot_h = correction * DOT3(normal, h); |
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| 204 | |||
| 205 | if (n_dot_h > 0.0F) { |
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| 206 | GLfloat spec_coef = lookup_shininess(ctx, side, n_dot_h); |
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| 207 | if (spec_coef > 1.0e-10) { |
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| 208 | spec_coef *= attenuation; |
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| 209 | ACC_SCALE_SCALAR_3V( spec[side], spec_coef, |
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| 210 | light->_MatSpecular[side]); |
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| 211 | } |
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| 212 | } |
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| 213 | } /*loop over lights*/ |
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| 214 | |||
| 215 | COPY_3V( Fcolor[j], sum[0] ); |
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| 216 | COPY_3V( Fspec[j], spec[0] ); |
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| 217 | Fcolor[j][3] = sumA[0]; |
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| 218 | |||
| 219 | #if IDX & LIGHT_TWOSIDE |
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| 220 | COPY_3V( Bcolor[j], sum[1] ); |
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| 221 | COPY_3V( Bspec[j], spec[1] ); |
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| 222 | Bcolor[j][3] = sumA[1]; |
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| 223 | #endif |
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| 224 | } |
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| 225 | } |
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| 226 | |||
| 227 | |||
| 228 | static void TAG(light_rgba)( struct gl_context *ctx, |
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| 229 | struct vertex_buffer *VB, |
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| 230 | struct tnl_pipeline_stage *stage, |
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| 231 | GLvector4f *input ) |
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| 232 | { |
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| 233 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 234 | GLuint j; |
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| 235 | |||
| 236 | GLfloat (*base)[3] = ctx->Light._BaseColor; |
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| 237 | GLfloat sumA[2]; |
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| 238 | |||
| 239 | const GLuint vstride = input->stride; |
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| 240 | const GLfloat *vertex = (GLfloat *) input->data; |
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| 241 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 242 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 243 | |||
| 244 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 245 | #if IDX & LIGHT_TWOSIDE |
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| 246 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 247 | #endif |
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| 248 | |||
| 249 | const GLuint nr = VB->Count; |
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| 250 | |||
| 251 | #ifdef TRACE |
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| 252 | fprintf(stderr, "%s\n", __FUNCTION__ ); |
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| 253 | #endif |
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| 254 | |||
| 255 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
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| 256 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 257 | |||
| 258 | #if IDX & LIGHT_TWOSIDE |
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| 259 | VB->BackfaceColorPtr = &store->LitColor[1]; |
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| 260 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 261 | #endif |
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| 262 | |||
| 263 | store->LitColor[0].stride = 16; |
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| 264 | store->LitColor[1].stride = 16; |
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| 265 | |||
| 266 | for (j = 0; j < nr; j++,STRIDE_F(vertex,vstride),STRIDE_F(normal,nstride)) { |
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| 267 | GLfloat sum[2][3]; |
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| 268 | struct gl_light *light; |
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| 269 | |||
| 270 | #if IDX & LIGHT_MATERIAL |
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| 271 | update_materials( ctx, store ); |
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| 272 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 273 | #if IDX & LIGHT_TWOSIDE |
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| 274 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 275 | #endif |
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| 276 | #endif |
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| 277 | |||
| 278 | COPY_3V(sum[0], base[0]); |
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| 279 | |||
| 280 | #if IDX & LIGHT_TWOSIDE |
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| 281 | COPY_3V(sum[1], base[1]); |
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| 282 | #endif |
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| 283 | |||
| 284 | /* Add contribution from each enabled light source */ |
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| 285 | foreach (light, &ctx->Light.EnabledList) { |
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| 286 | |||
| 287 | GLfloat n_dot_h; |
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| 288 | GLfloat correction; |
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| 289 | GLint side; |
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| 290 | GLfloat contrib[3]; |
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| 291 | GLfloat attenuation = 1.0; |
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| 292 | GLfloat VP[3]; /* unit vector from vertex to light */ |
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| 293 | GLfloat n_dot_VP; /* n dot VP */ |
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| 294 | GLfloat *h; |
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| 295 | |||
| 296 | /* compute VP and attenuation */ |
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| 297 | if (!(light->_Flags & LIGHT_POSITIONAL)) { |
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| 298 | /* directional light */ |
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| 299 | COPY_3V(VP, light->_VP_inf_norm); |
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| 300 | attenuation = light->_VP_inf_spot_attenuation; |
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| 301 | } |
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| 302 | else { |
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| 303 | GLfloat d; /* distance from vertex to light */ |
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| 304 | |||
| 305 | |||
| 306 | SUB_3V(VP, light->_Position, vertex); |
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| 307 | |||
| 308 | d = (GLfloat) LEN_3FV( VP ); |
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| 309 | |||
| 310 | if ( d > 1e-6) { |
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| 311 | GLfloat invd = 1.0F / d; |
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| 312 | SELF_SCALE_SCALAR_3V(VP, invd); |
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| 313 | } |
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| 314 | |||
| 315 | attenuation = 1.0F / (light->ConstantAttenuation + d * |
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| 316 | (light->LinearAttenuation + d * |
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| 317 | light->QuadraticAttenuation)); |
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| 318 | |||
| 319 | /* spotlight attenuation */ |
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| 320 | if (light->_Flags & LIGHT_SPOT) { |
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| 321 | GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection); |
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| 322 | |||
| 323 | if (PV_dot_dir |
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| 324 | continue; /* this light makes no contribution */ |
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| 325 | } |
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| 326 | else { |
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| 327 | GLfloat spot = powf(PV_dot_dir, light->SpotExponent); |
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| 328 | attenuation *= spot; |
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| 329 | } |
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| 330 | } |
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| 331 | } |
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| 332 | |||
| 333 | if (attenuation < 1e-3) |
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| 334 | continue; /* this light makes no contribution */ |
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| 335 | |||
| 336 | /* Compute dot product or normal and vector from V to light pos */ |
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| 337 | n_dot_VP = DOT3( normal, VP ); |
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| 338 | |||
| 339 | /* which side are we lighting? */ |
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| 340 | if (n_dot_VP < 0.0F) { |
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| 341 | ACC_SCALE_SCALAR_3V(sum[0], attenuation, light->_MatAmbient[0]); |
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| 342 | #if IDX & LIGHT_TWOSIDE |
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| 343 | side = 1; |
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| 344 | correction = -1; |
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| 345 | n_dot_VP = -n_dot_VP; |
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| 346 | #else |
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| 347 | continue; |
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| 348 | #endif |
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| 349 | } |
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| 350 | else { |
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| 351 | #if IDX & LIGHT_TWOSIDE |
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| 352 | ACC_SCALE_SCALAR_3V( sum[1], attenuation, light->_MatAmbient[1]); |
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| 353 | #endif |
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| 354 | side = 0; |
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| 355 | correction = 1; |
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| 356 | } |
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| 357 | |||
| 358 | COPY_3V(contrib, light->_MatAmbient[side]); |
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| 359 | |||
| 360 | /* diffuse term */ |
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| 361 | ACC_SCALE_SCALAR_3V(contrib, n_dot_VP, light->_MatDiffuse[side]); |
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| 362 | |||
| 363 | /* specular term - cannibalize VP... */ |
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| 364 | { |
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| 365 | if (ctx->Light.Model.LocalViewer) { |
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| 366 | GLfloat v[3]; |
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| 367 | COPY_3V(v, vertex); |
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| 368 | NORMALIZE_3FV(v); |
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| 369 | SUB_3V(VP, VP, v); /* h = VP + VPe */ |
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| 370 | h = VP; |
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| 371 | NORMALIZE_3FV(h); |
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| 372 | } |
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| 373 | else if (light->_Flags & LIGHT_POSITIONAL) { |
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| 374 | h = VP; |
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| 375 | ACC_3V(h, ctx->_EyeZDir); |
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| 376 | NORMALIZE_3FV(h); |
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| 377 | } |
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| 378 | else { |
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| 379 | h = light->_h_inf_norm; |
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| 380 | } |
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| 381 | |||
| 382 | n_dot_h = correction * DOT3(normal, h); |
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| 383 | |||
| 384 | if (n_dot_h > 0.0F) { |
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| 385 | GLfloat spec_coef = lookup_shininess(ctx, side, n_dot_h); |
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| 386 | ACC_SCALE_SCALAR_3V( contrib, spec_coef, |
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| 387 | light->_MatSpecular[side]); |
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| 388 | } |
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| 389 | } |
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| 390 | |||
| 391 | ACC_SCALE_SCALAR_3V( sum[side], attenuation, contrib ); |
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| 392 | } |
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| 393 | |||
| 394 | COPY_3V( Fcolor[j], sum[0] ); |
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| 395 | Fcolor[j][3] = sumA[0]; |
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| 396 | |||
| 397 | #if IDX & LIGHT_TWOSIDE |
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| 398 | COPY_3V( Bcolor[j], sum[1] ); |
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| 399 | Bcolor[j][3] = sumA[1]; |
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| 400 | #endif |
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| 401 | } |
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| 402 | } |
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| 403 | |||
| 404 | |||
| 405 | |||
| 406 | |||
| 407 | /* As below, but with just a single light. |
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| 408 | */ |
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| 409 | static void TAG(light_fast_rgba_single)( struct gl_context *ctx, |
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| 410 | struct vertex_buffer *VB, |
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| 411 | struct tnl_pipeline_stage *stage, |
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| 412 | GLvector4f *input ) |
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| 413 | |||
| 414 | { |
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| 415 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 416 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 417 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 418 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 419 | #if IDX & LIGHT_TWOSIDE |
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| 420 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 421 | #endif |
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| 422 | const struct gl_light *light = ctx->Light.EnabledList.next; |
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| 423 | GLuint j = 0; |
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| 424 | GLfloat base[2][4]; |
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| 425 | #if IDX & LIGHT_MATERIAL |
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| 426 | const GLuint nr = VB->Count; |
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| 427 | #else |
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| 428 | const GLuint nr = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->count; |
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| 429 | #endif |
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| 430 | |||
| 431 | #ifdef TRACE |
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| 432 | fprintf(stderr, "%s\n", __FUNCTION__ ); |
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| 433 | #endif |
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| 434 | |||
| 435 | (void) input; /* doesn't refer to Eye or Obj */ |
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| 436 | |||
| 437 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
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| 438 | #if IDX & LIGHT_TWOSIDE |
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| 439 | VB->BackfaceColorPtr = &store->LitColor[1]; |
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| 440 | #endif |
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| 441 | |||
| 442 | if (nr > 1) { |
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| 443 | store->LitColor[0].stride = 16; |
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| 444 | store->LitColor[1].stride = 16; |
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| 445 | } |
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| 446 | else { |
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| 447 | store->LitColor[0].stride = 0; |
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| 448 | store->LitColor[1].stride = 0; |
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| 449 | } |
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| 450 | |||
| 451 | for (j = 0; j < nr; j++, STRIDE_F(normal,nstride)) { |
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| 452 | |||
| 453 | GLfloat n_dot_VP; |
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| 454 | |||
| 455 | #if IDX & LIGHT_MATERIAL |
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| 456 | update_materials( ctx, store ); |
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| 457 | #endif |
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| 458 | |||
| 459 | /* No attenuation, so incoporate _MatAmbient into base color. |
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| 460 | */ |
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| 461 | #if !(IDX & LIGHT_MATERIAL) |
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| 462 | if ( j == 0 ) |
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| 463 | #endif |
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| 464 | { |
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| 465 | COPY_3V(base[0], light->_MatAmbient[0]); |
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| 466 | ACC_3V(base[0], ctx->Light._BaseColor[0] ); |
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| 467 | base[0][3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 468 | |||
| 469 | #if IDX & LIGHT_TWOSIDE |
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| 470 | COPY_3V(base[1], light->_MatAmbient[1]); |
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| 471 | ACC_3V(base[1], ctx->Light._BaseColor[1]); |
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| 472 | base[1][3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 473 | #endif |
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| 474 | } |
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| 475 | |||
| 476 | n_dot_VP = DOT3(normal, light->_VP_inf_norm); |
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| 477 | |||
| 478 | if (n_dot_VP < 0.0F) { |
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| 479 | #if IDX & LIGHT_TWOSIDE |
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| 480 | GLfloat n_dot_h = -DOT3(normal, light->_h_inf_norm); |
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| 481 | GLfloat sum[3]; |
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| 482 | COPY_3V(sum, base[1]); |
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| 483 | ACC_SCALE_SCALAR_3V(sum, -n_dot_VP, light->_MatDiffuse[1]); |
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| 484 | if (n_dot_h > 0.0F) { |
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| 485 | GLfloat spec = lookup_shininess(ctx, 1, n_dot_h); |
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| 486 | ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[1]); |
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| 487 | } |
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| 488 | COPY_3V(Bcolor[j], sum ); |
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| 489 | Bcolor[j][3] = base[1][3]; |
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| 490 | #endif |
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| 491 | COPY_4FV(Fcolor[j], base[0]); |
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| 492 | } |
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| 493 | else { |
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| 494 | GLfloat n_dot_h = DOT3(normal, light->_h_inf_norm); |
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| 495 | GLfloat sum[3]; |
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| 496 | COPY_3V(sum, base[0]); |
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| 497 | ACC_SCALE_SCALAR_3V(sum, n_dot_VP, light->_MatDiffuse[0]); |
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| 498 | if (n_dot_h > 0.0F) { |
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| 499 | GLfloat spec = lookup_shininess(ctx, 0, n_dot_h); |
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| 500 | ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[0]); |
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| 501 | } |
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| 502 | COPY_3V(Fcolor[j], sum ); |
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| 503 | Fcolor[j][3] = base[0][3]; |
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| 504 | #if IDX & LIGHT_TWOSIDE |
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| 505 | COPY_4FV(Bcolor[j], base[1]); |
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| 506 | #endif |
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| 507 | } |
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| 508 | } |
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| 509 | } |
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| 510 | |||
| 511 | |||
| 512 | /* Light infinite lights |
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| 513 | */ |
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| 514 | static void TAG(light_fast_rgba)( struct gl_context *ctx, |
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| 515 | struct vertex_buffer *VB, |
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| 516 | struct tnl_pipeline_stage *stage, |
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| 517 | GLvector4f *input ) |
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| 518 | { |
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| 519 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 520 | GLfloat sumA[2]; |
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| 521 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 522 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 523 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 524 | #if IDX & LIGHT_TWOSIDE |
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| 525 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 526 | #endif |
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| 527 | GLuint j = 0; |
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| 528 | #if IDX & LIGHT_MATERIAL |
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| 529 | const GLuint nr = VB->Count; |
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| 530 | #else |
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| 531 | const GLuint nr = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->count; |
||
| 532 | #endif |
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| 533 | const struct gl_light *light; |
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| 534 | |||
| 535 | #ifdef TRACE |
||
| 536 | fprintf(stderr, "%s %d\n", __FUNCTION__, nr ); |
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| 537 | #endif |
||
| 538 | |||
| 539 | (void) input; |
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| 540 | |||
| 541 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
||
| 542 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
||
| 543 | |||
| 544 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
||
| 545 | #if IDX & LIGHT_TWOSIDE |
||
| 546 | VB->BackfaceColorPtr = &store->LitColor[1]; |
||
| 547 | #endif |
||
| 548 | |||
| 549 | if (nr > 1) { |
||
| 550 | store->LitColor[0].stride = 16; |
||
| 551 | store->LitColor[1].stride = 16; |
||
| 552 | } |
||
| 553 | else { |
||
| 554 | store->LitColor[0].stride = 0; |
||
| 555 | store->LitColor[1].stride = 0; |
||
| 556 | } |
||
| 557 | |||
| 558 | for (j = 0; j < nr; j++, STRIDE_F(normal,nstride)) { |
||
| 559 | |||
| 560 | GLfloat sum[2][3]; |
||
| 561 | |||
| 562 | #if IDX & LIGHT_MATERIAL |
||
| 563 | update_materials( ctx, store ); |
||
| 564 | |||
| 565 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
||
| 566 | #if IDX & LIGHT_TWOSIDE |
||
| 567 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
||
| 568 | #endif |
||
| 569 | #endif |
||
| 570 | |||
| 571 | |||
| 572 | COPY_3V(sum[0], ctx->Light._BaseColor[0]); |
||
| 573 | #if IDX & LIGHT_TWOSIDE |
||
| 574 | COPY_3V(sum[1], ctx->Light._BaseColor[1]); |
||
| 575 | #endif |
||
| 576 | |||
| 577 | foreach (light, &ctx->Light.EnabledList) { |
||
| 578 | GLfloat n_dot_h, n_dot_VP, spec; |
||
| 579 | |||
| 580 | ACC_3V(sum[0], light->_MatAmbient[0]); |
||
| 581 | #if IDX & LIGHT_TWOSIDE |
||
| 582 | ACC_3V(sum[1], light->_MatAmbient[1]); |
||
| 583 | #endif |
||
| 584 | |||
| 585 | n_dot_VP = DOT3(normal, light->_VP_inf_norm); |
||
| 586 | |||
| 587 | if (n_dot_VP > 0.0F) { |
||
| 588 | ACC_SCALE_SCALAR_3V(sum[0], n_dot_VP, light->_MatDiffuse[0]); |
||
| 589 | n_dot_h = DOT3(normal, light->_h_inf_norm); |
||
| 590 | if (n_dot_h > 0.0F) { |
||
| 591 | spec = lookup_shininess(ctx, 0, n_dot_h); |
||
| 592 | ACC_SCALE_SCALAR_3V( sum[0], spec, light->_MatSpecular[0]); |
||
| 593 | } |
||
| 594 | } |
||
| 595 | #if IDX & LIGHT_TWOSIDE |
||
| 596 | else { |
||
| 597 | ACC_SCALE_SCALAR_3V(sum[1], -n_dot_VP, light->_MatDiffuse[1]); |
||
| 598 | n_dot_h = -DOT3(normal, light->_h_inf_norm); |
||
| 599 | if (n_dot_h > 0.0F) { |
||
| 600 | spec = lookup_shininess(ctx, 1, n_dot_h); |
||
| 601 | ACC_SCALE_SCALAR_3V( sum[1], spec, light->_MatSpecular[1]); |
||
| 602 | } |
||
| 603 | } |
||
| 604 | #endif |
||
| 605 | } |
||
| 606 | |||
| 607 | COPY_3V( Fcolor[j], sum[0] ); |
||
| 608 | Fcolor[j][3] = sumA[0]; |
||
| 609 | |||
| 610 | #if IDX & LIGHT_TWOSIDE |
||
| 611 | COPY_3V( Bcolor[j], sum[1] ); |
||
| 612 | Bcolor[j][3] = sumA[1]; |
||
| 613 | #endif |
||
| 614 | } |
||
| 615 | } |
||
| 616 | |||
| 617 | |||
| 618 | |||
| 619 | |||
| 620 | static void TAG(init_light_tab)( void ) |
||
| 621 | { |
||
| 622 | _tnl_light_tab[IDX] = TAG(light_rgba); |
||
| 623 | _tnl_light_fast_tab[IDX] = TAG(light_fast_rgba); |
||
| 624 | _tnl_light_fast_single_tab[IDX] = TAG(light_fast_rgba_single); |
||
| 625 | _tnl_light_spec_tab[IDX] = TAG(light_rgba_spec); |
||
| 626 | } |
||
| 627 | |||
| 628 | |||
| 629 | #undef TAG |
||
| 630 | #undef IDX |
||
| 631 | #undef NR_SIDES |