void select_glDrawElements(const pointer_state_t* vtx, GLenum mode, GLuint count, GLenum type, GLvoid * indices) {
if (count == 0) return;
if (vtx->pointer == NULL) return;
GLushort *ind = (GLushort*)indices;
GLsizei min, max;
getminmax_indices(indices, &max, &min, count);
max++;
GLfloat *vert = copy_gl_array(vtx->pointer, vtx->type,
vtx->size, vtx->stride,
GL_FLOAT, 3, 0, max);
GLfloat tmp[3];
init_select();
GLfloat zmin=1.0f, zmax=0.0f;
for (int i=min; i<max; i++) {
select_transform(vert+i*3);
if (vert[i*3+2]<zmin) zmin=vert[i*3+2];
if (vert[i*3+2]>zmax) zmax=vert[i*3+2];
}
if (zmin<0.0f) zmin = 0.0f;
if (zmax>1.0f) zmax = 1.0f;
#define FOUND() { \
if (zmin<state.selectbuf.zmin) state.selectbuf.zmin=zmin; \
if (zmax>state.selectbuf.zmax) state.selectbuf.zmax=zmax; \
state.selectbuf.hit = 1; \
free(vert); \
return; \
}
for (int i=0; i<count; i++) {
switch (mode) {
case GL_POINTS:
if (select_point_in_viewscreen(vert+ind[i]*3))
FOUND();
break;
case GL_LINES:
if (i%2==1) {
if (select_segment_in_viewscreen(vert+ind[(i-1)]*3, vert+ind[i]*3))
FOUND();
}
break;
case GL_LINE_STRIP:
case GL_LINE_LOOP: //FIXME: the last "loop" segment is missing here
if (i>0) {
if (select_segment_in_viewscreen(vert+ind[(i-1)]*3, vert+ind[i]*3))
FOUND();
}
break;
case GL_TRIANGLES:
if (i%3==2) {
if (select_triangle_in_viewscreen(vert+ind[(i-2)]*3, vert+ind[(i-1)]*3, vert+ind[i]*3))
FOUND();
}
break;
case GL_TRIANGLE_STRIP:
if (i>1) {
if (select_triangle_in_viewscreen(vert+ind[(i-2)]*3, vert+ind[(i-1)]*3, vert+ind[i]*3))
FOUND();
}
break;
case GL_TRIANGLE_FAN:
if (i>1) {
if (select_triangle_in_viewscreen(vert+ind[0]*3, vert+ind[(i-1)]*3, vert+ind[i]*3))
FOUND();
}
break;
default:
return; // Should never go there!
}
}
free(vert);
#undef FOUND
}
void select_glDrawElements(const pointer_state_t* vtx, GLenum mode, GLuint count, GLenum type, GLvoid * indices) {
if (count == 0) return;
if (vtx->pointer == NULL) return;
GLushort *ind = (GLushort*)indices;
GLsizei min, max;
getminmax_indices(indices, &max, &min, count);
max++;
GLfloat *vert = copy_gl_array(vtx->pointer, vtx->type,
vtx->size, vtx->stride,
GL_FLOAT, 4, 0, max);
init_select();
GLfloat zmin=1e10f, zmax=-10e6f;
int found = 0;
for (int i=min; i<max; i++) {
select_transform(vert+i*4);
ZMinMax(&glstate->selectbuf.zminoverall, &glstate->selectbuf.zmaxoverall, vert+i*4);
}
#define FOUND() { \
found = 1; \
glstate->selectbuf.hit = 1; \
}
for (int i=0; i<count; i++) {
switch (mode) {
case GL_POINTS:
if (select_point_in_viewscreen(vert+ind[i]*4)) {
ZMinMax(&zmin, &zmax, vert+ind[i]*4);
FOUND();
}
break;
case GL_LINES:
if (i%2==1) {
if (select_segment_in_viewscreen(vert+ind[(i-1)]*4, vert+ind[i]*4)) {
ZMinMax(&zmin, &zmax, vert+ind[i-1]*4);
ZMinMax(&zmin, &zmax, vert+ind[i]*4);
FOUND();
}
}
break;
case GL_LINE_STRIP:
case GL_LINE_LOOP: //FIXME: the last "loop" segment is missing here
if (i>0) {
if (select_segment_in_viewscreen(vert+ind[(i-1)]*4, vert+ind[i]*4)) {
ZMinMax(&zmin, &zmax, vert+ind[i-1]*4);
ZMinMax(&zmin, &zmax, vert+ind[i]*4);
FOUND();
}
}
break;
case GL_TRIANGLES:
if (i%3==2) {
if (select_triangle_in_viewscreen(vert+ind[(i-2)]*4, vert+ind[(i-1)]*4, vert+ind[i]*4)) {
ZMinMax(&zmin, &zmax, vert+ind[i-2]*4);
ZMinMax(&zmin, &zmax, vert+ind[i-1]*4);
ZMinMax(&zmin, &zmax, vert+ind[i]*4);
FOUND();
}
}
break;
case GL_TRIANGLE_STRIP:
if (i>1) {
if (select_triangle_in_viewscreen(vert+ind[(i-2)]*4, vert+ind[(i-1)]*4, vert+ind[i]*4)) {
ZMinMax(&zmin, &zmax, vert+ind[i-2]*4);
ZMinMax(&zmin, &zmax, vert+ind[i-1]*4);
ZMinMax(&zmin, &zmax, vert+ind[i]*4);
FOUND();
}
}
break;
case GL_TRIANGLE_FAN:
if (i>1) {
if (select_triangle_in_viewscreen(vert+ind[0]*4, vert+ind[(i-1)]*4, vert+ind[i]*4))
ZMinMax(&zmin, &zmax, vert+ind[0]*4);
ZMinMax(&zmin, &zmax, vert+ind[i-1]*4);
ZMinMax(&zmin, &zmax, vert+ind[i]*4);
FOUND();
}
break;
default:
return; // Should never go there!
}
}
free(vert);
if(found) {
if (zmin<glstate->selectbuf.zmin) glstate->selectbuf.zmin=zmin;
if (zmax>glstate->selectbuf.zmax) glstate->selectbuf.zmax=zmax;
}
#undef FOUND
}
