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Added a new function+struct to glutil that takes care of reading in the OpenGL data needed for gluProject/gluUnProject. This allows retopo and sculptmode to share some of the same code, and is probably useful elsewhere as well.

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Nicholas Bishop
2007-01-17 03:57:01 +00:00
parent a3c9ae8a88
commit 5f798002c9
6 changed files with 58 additions and 45 deletions
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23
source/blender/src/glutil.c
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@@ -596,6 +596,29 @@ void bglEnd(void)
}
/* Uses current OpenGL state to get view matrices for gluProject/gluUnProject */
void bgl_get_mats(bglMats *mats)
{
const double badvalue= 1.0e-6;
glGetDoublev(GL_MODELVIEW_MATRIX, mats->modelview);
glGetDoublev(GL_PROJECTION_MATRIX, mats->projection);
glGetIntegerv(GL_VIEWPORT, (GLint *)mats->viewport);
/* Very strange code here - it seems that certain bad values in the
modelview matrix can cause gluUnProject to give bad results. */
if(mats->modelview[0] < badvalue &&
mats->modelview[0] > -badvalue)
mats->modelview[0]= 0;
if(mats->modelview[5] < badvalue &&
mats->modelview[5] > -badvalue)
mats->modelview[5]= 0;
/* Set up viewport so that gluUnProject will give correct values */
mats->viewport[0] = 0;
mats->viewport[1] = 0;
}
/* *************** glPolygonOffset hack ************* */
// both temporal, so here for now (ton)