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working, forgot to enable client state for vertex/color arrays

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This commit is contained in:
Josh Holtrop 2011-04-15 09:48:58 -04:00
parent 126a355e47
commit a8b85f7246
2 changed files with 5 additions and 3 deletions
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1
sdl-opengl-vbo/checkGLError.h
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@ -5,6 +5,7 @@
#include <GL/gl.h>
#define checkGLError() _checkGLError(__FILE__, __LINE__)
#define GL_CHECK(x) ({x; checkGLError();})
GLenum _checkGLError(const char *fname, int lineno);

7
sdl-opengl-vbo/sdl-opengl-vbo.cc
View File

@ -10,12 +10,13 @@
#define HEIGHT 500
#define ADDR_DIFF(x, y) ((unsigned long) (y) - (unsigned long) (x))
#define GL_CHECK(x) ({x; checkGLError();})
void init(void)
{
GL_CHECK(glClearColor (0.0, 0.0, 0.0, 0.0));
GL_CHECK(glEnable(GL_DEPTH_TEST));
GL_CHECK(glEnableClientState(GL_VERTEX_ARRAY));
GL_CHECK(glEnableClientState(GL_COLOR_ARRAY));
GL_CHECK(glShadeModel(GL_SMOOTH));
GL_CHECK(glViewport(0, 0, WIDTH, HEIGHT));
GL_CHECK(glMatrixMode(GL_PROJECTION));
@ -35,7 +36,7 @@ void display(void)
{{0.8, 0.8, 0.0, 1.0}, {0.0, 0.0, 1.0, 1.0}},
{{-0.8, 0.8, 0.0, 1.0}, {0.0, 0.4, 1.0, 1.0}}
};
static const GLbyte indexes[] = {1, 0, 2, 3};
static const GLushort indexes[] = {1, 0, 2, 3};
GLuint buffers[2];
GL_CHECK(glGenBuffers(sizeof(buffers)/sizeof(buffers[0]), buffers));
GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, buffers[0]));
@ -50,7 +51,7 @@ void display(void)
(void *) ADDR_DIFF(&data, &data[0][0][0])));
GL_CHECK(glColorPointer(4, GL_FLOAT, ADDR_DIFF(&data[0], &data[1]),
(void *) ADDR_DIFF(&data, &data[0][1][0])));
GL_CHECK(glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_BYTE, NULL));
GL_CHECK(glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_SHORT, NULL));
SDL_GL_SwapBuffers();
}