X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=util.h;h=dcb84a0cbf7e259b8717c9861d2cc066d386a032;hp=0d499453048d2e9bebb2ea50c8d56fd75c01c67d;hb=75c27c449aabb27ed0b028b57b20d70005a6e447;hpb=02d19b8323a1b626acd9d3b4f08bb63f51149cf3

diff --git a/util.h b/util.h
index 0d49945..dcb84a0 100644
--- a/util.h
+++ b/util.h
@@ -1,7 +1,31 @@
 #ifndef _UTIL_H
 #define _UTIL_H 1
 
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <string>
+
+#include <GL/gl.h>
+
+#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+
 // assumes h in [0, 2pi> or [-pi, pi>
 void hsv2rgb(float h, float s, float v, float *r, float *g, float *b);
 
+// Column major (same as OpenGL).
+typedef double Matrix3x3[9];
+
+std::string read_file(const std::string &filename);
+GLuint compile_shader(const std::string &shader_src, GLenum type);
+void multiply_3x3_matrices(const Matrix3x3 a, const Matrix3x3 b, Matrix3x3 result);
+void invert_3x3_matrix(const Matrix3x3 m, Matrix3x3 result);
+void print_3x3_matrix(const Matrix3x3 m);
+
+#ifdef NDEBUG
+#define check_error()
+#else
+#define check_error() { int err = glGetError(); if (err != GL_NO_ERROR) { printf("GL error 0x%x at %s:%d\n", err, __FILE__, __LINE__); exit(1); } }
+#endif
+
 #endif // !defined(_UTIL_H)