diff options
Diffstat (limited to 'progs')
| -rw-r--r-- | progs/tests/vptorus.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/progs/tests/vptorus.c b/progs/tests/vptorus.c new file mode 100644 index 0000000000..764dea4ec2 --- /dev/null +++ b/progs/tests/vptorus.c @@ -0,0 +1,174 @@ +/* + * A lit, rotating torus via vertex program + */ + +#include <assert.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#define GL_GLEXT_PROTOTYPES +#include <GL/glut.h> + +static float Xrot = 0.0, Yrot = 0.0, Zrot = 0.0; +static GLboolean Anim = GL_TRUE; + + +static void Idle( void ) +{ + Xrot += .3; + Yrot += .4; + Zrot += .2; + glutPostRedisplay(); +} + + +static void Display( void ) +{ + glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(Xrot, 1, 0, 0); + glRotatef(Yrot, 0, 1, 0); + glRotatef(Zrot, 0, 0, 1); + glutSolidTorus(0.75, 2.0, 10, 20); + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void Reshape( int width, int height ) +{ + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); + glFrustum( -2.0, 2.0, -2.0, 2.0, 5.0, 25.0 ); + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + glTranslatef( 0.0, 0.0, -12.0 ); +} + + +static void Key( unsigned char key, int x, int y ) +{ + (void) x; + (void) y; + switch (key) { + case ' ': + Xrot = Yrot = Zrot = 0; + break; + case 'a': + Anim = !Anim; + if (Anim) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + break; + case 'z': + Zrot -= 5.0; + break; + case 'Z': + Zrot += 5.0; + break; + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void SpecialKey( int key, int x, int y ) +{ + const GLfloat step = 3.0; + (void) x; + (void) y; + switch (key) { + case GLUT_KEY_UP: + Xrot -= step; + break; + case GLUT_KEY_DOWN: + Xrot += step; + break; + case GLUT_KEY_LEFT: + Yrot -= step; + break; + case GLUT_KEY_RIGHT: + Yrot += step; + break; + } + glutPostRedisplay(); +} + + +static void Init( void ) +{ + /* borrowed from an nvidia demo: + * c[0..3] = modelview matrix + * c[4..7] = inverse modelview matrix + * c[32] = light pos + * c[35] = diffuse color + */ + static const char prog[] = + "!!VP1.0\n" + "#Simple transform and diffuse lighting\n" + "\n" + "DP4 o[HPOS].x, c[0], v[OPOS] ; # object x MVP -> clip\n" + "DP4 o[HPOS].y, c[1], v[OPOS] ;\n" + "DP4 o[HPOS].z, c[2], v[OPOS] ;\n" + "DP4 o[HPOS].w, c[3], v[OPOS] ;\n" + + "DP3 R1.x, c[4], v[NRML] ; # normal x MV-1T -> lighting normal\n" + "DP3 R1.y, c[5], v[NRML] ;\n" + "DP3 R1.z, c[6], v[NRML] ;\n" + + "DP3 R0, c[32], R1 ; # L.N\n" + "MUL o[COL0].xyz, R0, c[35] ; # col = L.N * diffuse\n" + "MOV o[TEX0], v[TEX0];\n" + "END"; + + if (!glutExtensionSupported("GL_NV_vertex_program")) { + printf("Sorry, this program requires GL_NV_vertex_program"); + exit(1); + } + + glLoadProgramNV(GL_VERTEX_PROGRAM_NV, 1, + strlen(prog), (const GLubyte *) prog); + assert(glIsProgramNV(1)); + glBindProgramNV(GL_VERTEX_PROGRAM_NV, 1); + + /* Load the program registers */ + glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 0, GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV); + glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 4, GL_MODELVIEW, GL_INVERSE_TRANSPOSE_NV); + + /* Light position */ + glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 32, 2, 2, 4, 1); + /* Diffuse material color */ + glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 35, 0.25, 0, 0.25, 1); + + glEnable(GL_VERTEX_PROGRAM_NV); + glEnable(GL_DEPTH_TEST); + glClearColor(0.3, 0.3, 0.3, 1); + + printf("glGetError = %d\n", (int) glGetError()); +} + + +int main( int argc, char *argv[] ) +{ + glutInit( &argc, argv ); + glutInitWindowPosition( 0, 0 ); + glutInitWindowSize( 250, 250 ); + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); + glutCreateWindow(argv[0]); + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutSpecialFunc( SpecialKey ); + glutDisplayFunc( Display ); + if (Anim) + glutIdleFunc(Idle); + Init(); + glutMainLoop(); + return 0; +} |