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Fixed a strange bug that caused gluUnProject to give bad values when the model and view were rotated a certain way, which made sculptmode fail to edit the model.

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This commit is contained in:
Nicholas Bishop 2006-11-20 18:19:22 +00:00
parent 3fbdcf7211
commit aebc00f0b5
1 changed files with 12 additions and 1 deletions
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13
source/blender/src/sculptmode.c
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@ -530,14 +530,25 @@ void sculptmode_rem_tex(void *junk0,void *junk1)
void init_sculptmatrices()
{
glPushMatrix();
const double badvalue= 1.0e-6;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glMultMatrixf(OBACT->obmat);
glGetDoublev(GL_MODELVIEW_MATRIX, G.scene->sculptdata.modelviewmat);
glGetDoublev(GL_PROJECTION_MATRIX, G.scene->sculptdata.projectionmat);
glGetIntegerv(GL_VIEWPORT, (GLint *)G.scene->sculptdata.viewport);
/* Very strange code here - it seems that certain bad values in the
modelview matrix can cause gluUnProject to give bad results. */
if(G.scene->sculptdata.modelviewmat[0] < badvalue &&
G.scene->sculptdata.modelviewmat[0] > -badvalue)
G.scene->sculptdata.modelviewmat[0]= 0;
if(G.scene->sculptdata.modelviewmat[5] < badvalue &&
G.scene->sculptdata.modelviewmat[5] > -badvalue)
G.scene->sculptdata.modelviewmat[5]= 0;
/* Set up viewport so that gluUnProject will give correct values */
G.scene->sculptdata.viewport[0] = 0;
G.scene->sculptdata.viewport[1] = 0;