KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

glVertex* is the provoking "cmd" (that is, by the time of glVertex*, we must have all other attributes already set). 

i am committing this before i forget.  however, i'm still leaving my code disabled, because the old code seems legal.
This commit is contained in:
Daniel Borca 2005-01-19 07:52:49 +00:00
parent 59c2e16e75
commit 9ebce91a66
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
progs/tests/dinoshade.c
View File

@ -260,6 +260,7 @@ extrudeSolidFromPolygon(GLfloat data[][2], unsigned int dataSize,
from being "smoothed" */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= count; i++) {
#if 1 /* weird, but seems to be legal */
/* mod function handles closing the edge */
glVertex3f(data[i % count][0], data[i % count][1], 0.0);
glVertex3f(data[i % count][0], data[i % count][1], thickness);
@ -271,6 +272,19 @@ extrudeSolidFromPolygon(GLfloat data[][2], unsigned int dataSize,
dy = data[i % count][0] - data[(i + 1) % count][0];
len = sqrt(dx * dx + dy * dy);
glNormal3f(dx / len, dy / len, 0.0);
#else /* the nice way of doing it */
/* Calculate a unit normal by dividing by Euclidean
distance. We * could be lazy and use
glEnable(GL_NORMALIZE) so we could pass in * arbitrary
normals for a very slight performance hit. */
dx = data[i % count][1] - data[(i - 1 + count) % count][1];
dy = data[(i - 1 + count) % count][0] - data[i % count][0];
len = sqrt(dx * dx + dy * dy);
glNormal3f(dx / len, dy / len, 0.0);
/* mod function handles closing the edge */
glVertex3f(data[i % count][0], data[i % count][1], 0.0);
glVertex3f(data[i % count][0], data[i % count][1], thickness);
#endif
}
glEnd();
glEndList();