| 0,0 → 1,114 |
|---|
| #include "zgl.h" |
| |
| int glRenderMode(int mode) |
| { |
| GLContext *c=gl_get_context(); |
| int result=0; |
| |
| switch(c->render_mode) { |
| case GL_RENDER: |
| break; |
| case GL_SELECT: |
| if (c->select_overflow) { |
| result=-c->select_hits; |
| } else { |
| result=c->select_hits; |
| } |
| c->select_overflow=0; |
| c->select_ptr=c->select_buffer; |
| c->name_stack_size=0; |
| break; |
| default: |
| assert(0); |
| } |
| switch(mode) { |
| case GL_RENDER: |
| c->render_mode=GL_RENDER; |
| break; |
| case GL_SELECT: |
| c->render_mode=GL_SELECT; |
| assert( c->select_buffer != NULL); |
| c->select_ptr=c->select_buffer; |
| c->select_hits=0; |
| c->select_overflow=0; |
| c->select_hit=NULL; |
| break; |
| default: |
| assert(0); |
| } |
| return result; |
| } |
| |
| void glSelectBuffer(int size,unsigned int *buf) |
| { |
| GLContext *c=gl_get_context(); |
| |
| assert(c->render_mode != GL_SELECT); |
| |
| c->select_buffer=buf; |
| c->select_size=size; |
| } |
| |
| |
| void glopInitNames(GLContext *c,GLParam *p) |
| { |
| if (c->render_mode == GL_SELECT) { |
| c->name_stack_size=0; |
| c->select_hit=NULL; |
| } |
| } |
| |
| void glopPushName(GLContext *c,GLParam *p) |
| { |
| if (c->render_mode == GL_SELECT) { |
| assert(c->name_stack_size<MAX_NAME_STACK_DEPTH); |
| c->name_stack[c->name_stack_size++]=p[1].i; |
| c->select_hit=NULL; |
| } |
| } |
| |
| void glopPopName(GLContext *c,GLParam *p) |
| { |
| if (c->render_mode == GL_SELECT) { |
| assert(c->name_stack_size>0); |
| c->name_stack_size--; |
| c->select_hit=NULL; |
| } |
| } |
| |
| void glopLoadName(GLContext *c,GLParam *p) |
| { |
| if (c->render_mode == GL_SELECT) { |
| assert(c->name_stack_size>0); |
| c->name_stack[c->name_stack_size-1]=p[1].i; |
| c->select_hit=NULL; |
| } |
| } |
| |
| void gl_add_select(GLContext *c,unsigned int zmin,unsigned int zmax) |
| { |
| unsigned int *ptr; |
| int n,i; |
| |
| if (!c->select_overflow) { |
| if (c->select_hit==NULL) { |
| n=c->name_stack_size; |
| if ((c->select_ptr-c->select_buffer+3+n) > |
| c->select_size) { |
| c->select_overflow=1; |
| } else { |
| ptr=c->select_ptr; |
| c->select_hit=ptr; |
| *ptr++=c->name_stack_size; |
| *ptr++=zmin; |
| *ptr++=zmax; |
| for(i=0;i<n;i++) *ptr++=c->name_stack[i]; |
| c->select_ptr=ptr; |
| c->select_hits++; |
| } |
| } else { |
| if (zmin<c->select_hit[1]) c->select_hit[1]=zmin; |
| if (zmax>c->select_hit[2]) c->select_hit[2]=zmax; |
| } |
| } |
| } |