diff options
author | Keith Whitwell <keithw@vmware.com> | 2009-05-13 13:47:38 +0100 |
---|---|---|
committer | José Fonseca <jfonseca@vmware.com> | 2009-06-01 18:39:58 -0700 |
commit | 00e7a600776ceb589bd5939ccd8aad937527db81 (patch) | |
tree | d215cc1fb3c2a021f94042e3aeea40cf0d04cc76 /progs/trivial | |
parent | 3c756ed39f93bd26bc81f6e3be0440429ad58c40 (diff) |
trivial/tri-z: add controls for depthrange min/max
Also add key to set up quake-1 style ztrick rendering with clear depth
1.0, deptrange(1.0, 0.0) and depthfunc GL_GREATER.
Diffstat (limited to 'progs/trivial')
-rw-r--r-- | progs/trivial/tri-z.c | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/progs/trivial/tri-z.c b/progs/trivial/tri-z.c index 335d2b90e2..014aaa071a 100644 --- a/progs/trivial/tri-z.c +++ b/progs/trivial/tri-z.c @@ -57,13 +57,19 @@ static struct { GLenum func; const char *str; } funcs[] = static int curFunc = 0; static double clearVal = 1.0; - +static float minZ = 0.0; +static float maxZ = 1.0; static void usage(void) { - printf("t - toggle rendering order of triangles\n"); - printf("c - toggle Z clear value between 0, 1\n"); - printf("f - cycle through depth test functions\n"); + printf("t - toggle rendering order of triangles\n"); + printf("c - toggle Z clear value between 0, 1\n"); + printf("f - cycle through depth test functions\n"); + printf("n/N - decrease/increase depthrange minZ\n"); + printf("x/X - decrease/increase depthrange maxZ\n"); + printf("spc - reset\n"); + printf("z - set to reverse-direction (ztrick) mode\n"); + fflush(stdout); } @@ -97,9 +103,11 @@ static void drawRightTriangle(void) void display(void) { - printf("GL_CLEAR_DEPTH = %f GL_DEPTH_FUNC = %s\n", - clearVal, funcs[curFunc].str); + printf("GL_CLEAR_DEPTH = %.2f, GL_DEPTH_FUNC = %s, DepthRange(%.1f, %.1f)\n", + clearVal, funcs[curFunc].str, minZ, maxZ); + fflush(stdout); glClearDepth(clearVal); + glDepthRange(minZ, maxZ); glDepthFunc(funcs[curFunc].func); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); @@ -131,27 +139,49 @@ void reshape(int w, int h) void keyboard(unsigned char key, int x, int y) { switch (key) { + case 'n': + minZ -= .1; + break; + case 'N': + minZ += .1; + break; + case 'x': + maxZ -= .1; + break; + case 'X': + maxZ += .1; + break; case 'c': case 'C': clearVal = 1.0 - clearVal; - glutPostRedisplay(); break; case 'f': case 'F': curFunc = (curFunc + 1) % NUM_FUNCS; - glutPostRedisplay(); break; case 't': case 'T': leftFirst = !leftFirst; - glutPostRedisplay(); + break; + case ' ': + curFunc = 0; + clearVal = 1.0; + minZ = 0.0; + maxZ = 1.0; + break; + case 'z': + curFunc = 2; + clearVal = 0.0; + minZ = 1.0; + maxZ = 0.0; break; case 27: /* Escape key */ exit(0); break; default: - break; + return; } + glutPostRedisplay(); } /* Main Loop |