+++ /dev/null
-/*
- * Test vertex arrays with GL_NV_vertex_program
- *
- * Based on a stripped-down version of the isosurf demo.
- * The vertex program is trivial: compute the resulting
- * RGB color as a linear function of vertex XYZ.
- */
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include "GL/glew.h"
-#include "GL/glut.h"
-
-#define MAXVERTS 10000
-static float data[MAXVERTS][6];
-static GLint numverts;
-
-static GLfloat xrot;
-static GLfloat yrot;
-static GLboolean useArrays = GL_TRUE;
-static GLboolean useProgram = GL_TRUE;
-static GLboolean useList = GL_FALSE;
-
-
-static void read_surface( char *filename )
-{
- FILE *f;
-
- f = fopen(filename,"r");
- if (!f) {
- printf("couldn't read %s\n", filename);
- exit(1);
- }
-
- numverts = 0;
- while (numverts < MAXVERTS) {
- int result;
- result = fscanf( f, "%f %f %f %f %f %f",
- &data[numverts][0], &data[numverts][1], &data[numverts][2],
- &data[numverts][3], &data[numverts][4], &data[numverts][5] );
- if (result == EOF) {
- break;
- }
- numverts++;
- }
-
- printf("%d vertices, %d triangles\n", numverts, numverts-2);
- printf("data = %p\n", (void *) data);
- fclose(f);
-}
-
-
-
-
-static void Display(void)
-{
- if (useProgram)
- glEnable(GL_VERTEX_PROGRAM_NV);
- else
- glDisable(GL_VERTEX_PROGRAM_NV);
-
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- glPushMatrix();
- glRotatef(xrot, 1, 0, 0);
- glRotatef(yrot, 0, 1, 0);
- glScalef(2, 2, 2);
- if (useArrays) {
- if (useProgram) {
- glVertexAttribPointerNV( 0, 3, GL_FLOAT, 6 * sizeof(GLfloat), data );
- glEnableClientState( GL_VERTEX_ATTRIB_ARRAY0_NV );
- glVertexAttribPointerNV( 2, 3, GL_FLOAT, 6 * sizeof(GLfloat), ((GLfloat *) data) + 3);
- glEnableClientState( GL_VERTEX_ATTRIB_ARRAY2_NV);
- }
- else {
- glVertexPointer( 3, GL_FLOAT, 6 * sizeof(GLfloat), data );
- glEnableClientState( GL_VERTEX_ARRAY );
- glNormalPointer( GL_FLOAT, 6 * sizeof(GLfloat), ((GLfloat *) data) + 3);
- glEnableClientState( GL_NORMAL_ARRAY );
- }
-
- if (useList) {
- /* dumb, but a good test */
- glNewList(1,GL_COMPILE);
- glDrawArrays(GL_TRIANGLE_STRIP, 0, numverts);
- glEndList();
- glCallList(1);
- }
- else {
- glDrawArrays(GL_TRIANGLE_STRIP, 0, numverts);
- }
-
- glDisableClientState( GL_VERTEX_ATTRIB_ARRAY0_NV );
- glDisableClientState( GL_VERTEX_ATTRIB_ARRAY2_NV);
- glDisableClientState( GL_VERTEX_ARRAY );
- glDisableClientState( GL_NORMAL_ARRAY );
- }
- else {
- int i;
- glBegin(GL_TRIANGLE_STRIP);
- for (i = 0; i < numverts; i++) {
- glNormal3fv( data[i] + 3 );
- glVertex3fv( data[i] + 0 );
- }
- glEnd();
- }
- glPopMatrix();
-
- if (glGetError())
- printf("Error!\n");
-
- glutSwapBuffers();
-}
-
-
-static void InitMaterials(void)
-{
- static float ambient[] = {0.1, 0.1, 0.1, 1.0};
- static float diffuse[] = {0.5, 1.0, 1.0, 1.0};
- static float position0[] = {0.0, 0.0, 20.0, 0.0};
- static float position1[] = {0.0, 0.0, -20.0, 0.0};
- static float front_mat_shininess[] = {60.0};
- static float front_mat_specular[] = {0.2, 0.2, 0.2, 1.0};
- static float front_mat_diffuse[] = {0.5, 0.28, 0.38, 1.0};
- /*
- static float back_mat_shininess[] = {60.0};
- static float back_mat_specular[] = {0.5, 0.5, 0.2, 1.0};
- static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
- */
- static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
- static float lmodel_twoside[] = {GL_FALSE};
-
- glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
- glLightfv(GL_LIGHT0, GL_POSITION, position0);
- glEnable(GL_LIGHT0);
-
- glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
- glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
- glLightfv(GL_LIGHT1, GL_POSITION, position1);
- glEnable(GL_LIGHT1);
-
- glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
- glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
-
- glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_mat_shininess);
- glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_mat_specular);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, front_mat_diffuse);
- glEnable(GL_LIGHTING);
-}
-
-
-static void init_program(void)
-{
- /*
- * c[0..3] = modelview matrix
- * c[4..7] = inverse modelview matrix
- * c[30] = color scale
- * c[31] = color bias
- */
- static const char prog[] =
- "!!VP1.0\n"
-
- "# RGB is proportional to XYZ \n"
-
- "MUL R0, v[OPOS], c[30]; \n"
- "ADD o[COL0], R0, c[31]; \n"
-
- "# Continue with typical modelview/projection\n"
- "MOV R3, v[OPOS]; \n"
- "DP4 o[HPOS].x, c[0], R3 ; # object x MVP -> clip\n"
- "DP4 o[HPOS].y, c[1], R3 ;\n"
- "DP4 o[HPOS].z, c[2], R3 ;\n"
- "DP4 o[HPOS].w, c[3], R3 ;\n"
-
- "END";
-
- static const GLfloat scale[4] = {2.0, 2.0, 2.0, 0.0};
- static const GLfloat bias[4] = {1.0, 1.0, 1.0, 0.0};
-
- if (!glutExtensionSupported("GL_NV_vertex_program")) {
- printf("Sorry, this program requires GL_NV_vertex_program\n");
- 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);
-
- glProgramParameter4fvNV(GL_VERTEX_PROGRAM_NV, 30, scale);
- glProgramParameter4fvNV(GL_VERTEX_PROGRAM_NV, 31, bias);
-}
-
-
-static void init(void)
-{
- xrot = 0;
- yrot = 0;
- glClearColor(0.0, 0.0, 1.0, 0.0);
- glEnable( GL_DEPTH_TEST );
- glEnable(GL_NORMALIZE);
- InitMaterials();
- read_surface( "../demos/isosurf.dat" );
- init_program();
-}
-
-
-static void Reshape(int width, int height)
-{
- glViewport(0, 0, (GLint)width, (GLint)height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum( -1.0, 1.0, -1.0, 1.0, 5, 25 );
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0, 0, -15);
-}
-
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 27:
- exit(0);
- case 'a':
- useArrays = !useArrays;
- printf("use arrays: %s\n", useArrays ? "yes" : "no");
- break;
- case 'l':
- useList = !useList;
- printf("use list: %s\n", useList ? "yes" : "no");
- break;
- case 'p':
- useProgram = !useProgram;
- printf("use program: %s\n", useProgram ? "yes" : "no");
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_LEFT:
- yrot -= 15.0;
- break;
- case GLUT_KEY_RIGHT:
- yrot += 15.0;
- break;
- case GLUT_KEY_UP:
- xrot += 15.0;
- break;
- case GLUT_KEY_DOWN:
- xrot -= 15.0;
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-
-
-int main(int argc, char **argv)
-{
- glutInit(&argc, argv);
- glutInitDisplayMode( GLUT_DEPTH | GLUT_RGB | GLUT_DOUBLE );
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(400, 400);
- if (glutCreateWindow("Isosurface") <= 0) {
- exit(0);
- }
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(SpecialKey);
- glutDisplayFunc(Display);
-
- init();
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff