trivial: draw non-interleaved arrays

diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile
index 82daae7dfd71daa400eb1994a028cd4f019e4abf..6e332aa728ea9f83c129d98dea1371b800afc1ef 100644 (file)
--- a/progs/trivial/Makefile
+++ b/progs/trivial/Makefile
@@ -23,6 +23,7 @@ SOURCES = \
        dlist-edgeflag.c \
        dlist-degenerate.c \
        drawarrays.c \
+       draw2arrays.c \
        drawelements.c \
        drawrange.c \
        flat-clip.c \

diff --git a/progs/trivial/SConscript b/progs/trivial/SConscript
index 4694cb7adc70e6f5617cad38c32d3a8af41b2d7a..4796a4d37f2571832d437acd6488e8069c4f378c 100644 (file)
--- a/progs/trivial/SConscript
+++ b/progs/trivial/SConscript
@@ -19,6 +19,7 @@ progs = [
        'dlist-edgeflag',
        'dlist-degenerate',
        'drawarrays',
+       'draw2arrays',
        'drawelements',
        'drawrange',
        'flat-clip',

diff --git a/progs/trivial/draw2arrays.c b/progs/trivial/draw2arrays.c
new file mode 100644 (file)
index 0000000..95a8998
--- /dev/null
+++ b/progs/trivial/draw2arrays.c
@@ -0,0 +1,117 @@
+/* Basic VBO */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+GLfloat pos[][3] =
+   { {  0.9, -0.9, 0.0 },
+     {  0.9,  0.9, 0.0 },
+     { -0.9,  0.9, 0.0 },
+     { -0.9, -0.9, 0.0 } };
+
+GLubyte color[][4] = 
+{ { 0x00, 0x00, 0xff, 0x00 },
+  { 0x00, 0xff, 0x00, 0x00 },
+  { 0xff, 0x00, 0x00, 0x00 },
+  { 0xff, 0xff, 0xff, 0x00 } };
+
+static void Init( void )
+{
+   GLint errno;
+   GLuint prognum;
+   
+   static const char *prog1 =
+      "!!ARBvp1.0\n"
+      "MOV  result.color, vertex.color;\n"
+      "MOV  result.position, vertex.position;\n"
+      "END\n";
+
+   glGenProgramsARB(1, &prognum);
+   glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
+   glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+                     strlen(prog1), (const GLubyte *) prog1);
+
+   assert(glIsProgramARB(prognum));
+   errno = glGetError();
+   printf("glGetError = %d\n", errno);
+   if (errno != GL_NO_ERROR)
+   {
+      GLint errorpos;
+
+      glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
+      printf("errorpos: %d\n", errorpos);
+      printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+   }
+
+
+   glEnableClientState( GL_VERTEX_ARRAY );
+   glEnableClientState( GL_COLOR_ARRAY );
+
+   glVertexPointer( 3, GL_FLOAT, sizeof(pos[0]), pos );
+   glColorPointer( 4, GL_UNSIGNED_BYTE, sizeof(color[0]), color );
+
+}
+
+
+
+static void Display( void )
+{
+   glClearColor(0.3, 0.3, 0.3, 1);
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glEnable(GL_VERTEX_PROGRAM_ARB);
+
+//   glDrawArrays( GL_TRIANGLES, 0, 3 );
+   glDrawArrays( GL_TRIANGLES, 1, 3 );
+
+   glFlush(); 
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   /*glTranslatef( 0.0, 0.0, -15.0 );*/
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 250, 250 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glewInit();
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}