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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | /* |
| 2 | Copyright (C) 1996-1997 Id Software, Inc. |
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| 3 | |||
| 4 | This program is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU General Public License |
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| 6 | as published by the Free Software Foundation; either version 2 |
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| 7 | of the License, or (at your option) any later version. |
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| 8 | |||
| 9 | This program is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 12 | |||
| 13 | See the GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program; if not, write to the Free Software |
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| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 18 | |||
| 19 | */ |
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| 20 | // d_part.c: software driver module for drawing particles |
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| 21 | |||
| 22 | #include "quakedef.h" |
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| 23 | #include "d_local.h" |
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| 24 | |||
| 25 | |||
| 26 | /* |
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| 27 | ============== |
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| 28 | D_EndParticles |
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| 29 | ============== |
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| 30 | */ |
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| 31 | void D_EndParticles (void) |
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| 32 | { |
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| 33 | // not used by software driver |
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| 34 | } |
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| 35 | |||
| 36 | |||
| 37 | /* |
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| 38 | ============== |
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| 39 | D_StartParticles |
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| 40 | ============== |
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| 41 | */ |
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| 42 | void D_StartParticles (void) |
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| 43 | { |
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| 44 | // not used by software driver |
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| 45 | } |
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| 46 | |||
| 47 | |||
| 48 | #if !id386 |
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| 49 | |||
| 50 | /* |
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| 51 | ============== |
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| 52 | D_DrawParticle |
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| 53 | ============== |
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| 54 | */ |
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| 55 | void D_DrawParticle (particle_t *pparticle) |
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| 56 | { |
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| 57 | vec3_t local, transformed; |
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| 58 | float zi; |
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| 59 | byte *pdest; |
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| 60 | short *pz; |
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| 61 | int i, izi, pix, count, u, v; |
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| 62 | |||
| 63 | // transform point |
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| 64 | VectorSubtract (pparticle->org, r_origin, local); |
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| 65 | |||
| 66 | transformed[0] = DotProduct(local, r_pright); |
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| 67 | transformed[1] = DotProduct(local, r_pup); |
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| 68 | transformed[2] = DotProduct(local, r_ppn); |
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| 69 | |||
| 70 | if (transformed[2] < PARTICLE_Z_CLIP) |
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| 71 | return; |
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| 72 | |||
| 73 | // project the point |
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| 74 | // FIXME: preadjust xcenter and ycenter |
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| 75 | zi = 1.0 / transformed[2]; |
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| 76 | u = (int)(xcenter + zi * transformed[0] + 0.5); |
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| 77 | v = (int)(ycenter - zi * transformed[1] + 0.5); |
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| 78 | |||
| 79 | if ((v > d_vrectbottom_particle) || |
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| 80 | (u > d_vrectright_particle) || |
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| 81 | (v < d_vrecty) || |
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| 82 | (u < d_vrectx)) |
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| 83 | { |
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| 84 | return; |
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| 85 | } |
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| 86 | |||
| 87 | pz = d_pzbuffer + (d_zwidth * v) + u; |
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| 88 | pdest = d_viewbuffer + d_scantable[v] + u; |
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| 89 | izi = (int)(zi * 0x8000); |
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| 90 | |||
| 91 | pix = izi >> d_pix_shift; |
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| 92 | |||
| 93 | if (pix < d_pix_min) |
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| 94 | pix = d_pix_min; |
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| 95 | else if (pix > d_pix_max) |
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| 96 | pix = d_pix_max; |
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| 97 | |||
| 98 | switch (pix) |
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| 99 | { |
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| 100 | case 1: |
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| 101 | count = 1 << d_y_aspect_shift; |
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| 102 | |||
| 103 | for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) |
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| 104 | { |
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| 105 | if (pz[0] <= izi) |
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| 106 | { |
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| 107 | pz[0] = izi; |
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| 108 | pdest[0] = pparticle->color; |
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| 109 | } |
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| 110 | } |
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| 111 | break; |
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| 112 | |||
| 113 | case 2: |
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| 114 | count = 2 << d_y_aspect_shift; |
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| 115 | |||
| 116 | for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) |
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| 117 | { |
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| 118 | if (pz[0] <= izi) |
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| 119 | { |
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| 120 | pz[0] = izi; |
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| 121 | pdest[0] = pparticle->color; |
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| 122 | } |
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| 123 | |||
| 124 | if (pz[1] <= izi) |
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| 125 | { |
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| 126 | pz[1] = izi; |
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| 127 | pdest[1] = pparticle->color; |
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| 128 | } |
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| 129 | } |
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| 130 | break; |
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| 131 | |||
| 132 | case 3: |
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| 133 | count = 3 << d_y_aspect_shift; |
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| 134 | |||
| 135 | for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) |
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| 136 | { |
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| 137 | if (pz[0] <= izi) |
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| 138 | { |
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| 139 | pz[0] = izi; |
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| 140 | pdest[0] = pparticle->color; |
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| 141 | } |
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| 142 | |||
| 143 | if (pz[1] <= izi) |
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| 144 | { |
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| 145 | pz[1] = izi; |
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| 146 | pdest[1] = pparticle->color; |
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| 147 | } |
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| 148 | |||
| 149 | if (pz[2] <= izi) |
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| 150 | { |
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| 151 | pz[2] = izi; |
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| 152 | pdest[2] = pparticle->color; |
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| 153 | } |
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| 154 | } |
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| 155 | break; |
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| 156 | |||
| 157 | case 4: |
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| 158 | count = 4 << d_y_aspect_shift; |
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| 159 | |||
| 160 | for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) |
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| 161 | { |
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| 162 | if (pz[0] <= izi) |
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| 163 | { |
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| 164 | pz[0] = izi; |
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| 165 | pdest[0] = pparticle->color; |
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| 166 | } |
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| 167 | |||
| 168 | if (pz[1] <= izi) |
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| 169 | { |
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| 170 | pz[1] = izi; |
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| 171 | pdest[1] = pparticle->color; |
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| 172 | } |
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| 173 | |||
| 174 | if (pz[2] <= izi) |
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| 175 | { |
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| 176 | pz[2] = izi; |
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| 177 | pdest[2] = pparticle->color; |
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| 178 | } |
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| 179 | |||
| 180 | if (pz[3] <= izi) |
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| 181 | { |
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| 182 | pz[3] = izi; |
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| 183 | pdest[3] = pparticle->color; |
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| 184 | } |
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| 185 | } |
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| 186 | break; |
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| 187 | |||
| 188 | default: |
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| 189 | count = pix << d_y_aspect_shift; |
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| 190 | |||
| 191 | for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) |
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| 192 | { |
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| 193 | for (i=0 ; i |
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| 194 | { |
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| 195 | if (pz[i] <= izi) |
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| 196 | { |
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| 197 | pz[i] = izi; |
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| 198 | pdest[i] = pparticle->color; |
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| 199 | } |
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| 200 | } |
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| 201 | } |
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| 202 | break; |
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| 203 | } |
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| 204 | } |
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| 205 | |||
| 206 | #endif // !id386 |
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| 207 |