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-rw-r--r--progs/fp/point-position.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/progs/fp/point-position.c b/progs/fp/point-position.c
new file mode 100644
index 0000000000..c352a939cb
--- /dev/null
+++ b/progs/fp/point-position.c
@@ -0,0 +1,119 @@
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+#include "GL/gl.h"
+
+
+
+static void Init( void )
+{
+ static const char *modulate2D =
+ "!!ARBfp1.0\n"
+ "MUL result.color, fragment.position, {.005}.x; \n"
+ "END"
+ ;
+ GLuint modulateProg;
+
+ if (!glutExtensionSupported("GL_ARB_fragment_program")) {
+ printf("Error: GL_ARB_fragment_program not supported!\n");
+ exit(1);
+ }
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+ /* Setup the fragment program */
+ glGenProgramsARB(1, &modulateProg);
+ glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, modulateProg);
+ glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+ strlen(modulate2D), (const GLubyte *)modulate2D);
+
+ printf("glGetError = 0x%x\n", (int) glGetError());
+ printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
+ (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+
+ glEnable(GL_FRAGMENT_PROGRAM_ARB);
+
+ glClearColor(.3, .3, .3, 0);
+}
+
+static void Reshape(int width, int height)
+{
+
+ glViewport(0, 0, (GLint)width, (GLint)height);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+ glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+ switch (key) {
+ case 27:
+ exit(1);
+ default:
+ return;
+ }
+
+ glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+ glClear(GL_COLOR_BUFFER_BIT);
+
+#if 0
+ glBegin(GL_QUADS);
+ glTexCoord2f(1,0);
+ glVertex3f( 0.9, -0.9, -30.0);
+ glTexCoord2f(1,1);
+ glVertex3f( 0.9, 0.9, -30.0);
+ glTexCoord2f(0,1);
+ glVertex3f(-0.9, 0.9, -30.0);
+ glTexCoord2f(0,0);
+ glVertex3f(-0.9, -0.9, -30.0);
+ glEnd();
+#else
+ glPointSize(100);
+ glBegin(GL_POINTS);
+ glColor3f(0,0,1);
+ glVertex3f( 0, 0, -30.0);
+ glEnd();
+#endif
+
+ glFlush();
+
+
+}
+
+
+int main(int argc, char **argv)
+{
+ GLenum type;
+
+ glutInit(&argc, argv);
+
+
+
+ glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
+
+ type = GLUT_RGB;
+ type |= GLUT_SINGLE;
+ glutInitDisplayMode(type);
+
+ if (glutCreateWindow("First Tri") == GL_FALSE) {
+ exit(1);
+ }
+
+ Init();
+
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Draw);
+ glutMainLoop();
+ return 0;
+}