labyrinth

annotate src/opengl.c @ 0:8ba79034e8a6

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labyrinth example initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 15 Jan 2015 14:59:38 +0200
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nuclear@0 1 #include "opengl.h"
nuclear@0 2
nuclear@0 3 static void set_light_param(int idx, unsigned int p, float x, float y, float z)
nuclear@0 4 {
nuclear@0 5 float v[4];
nuclear@0 6 v[0] = x;
nuclear@0 7 v[1] = y;
nuclear@0 8 v[2] = z;
nuclear@0 9 v[3] = 1.0f;
nuclear@0 10 glLightfv(GL_LIGHT0 + idx, p, v);
nuclear@0 11 }
nuclear@0 12
nuclear@0 13 void set_light_position(int idx, float x, float y, float z)
nuclear@0 14 {
nuclear@0 15 set_light_param(idx, GL_POSITION, x, y, z);
nuclear@0 16 }
nuclear@0 17
nuclear@0 18 void set_light_color(int idx, float r, float g, float b)
nuclear@0 19 {
nuclear@0 20 set_light_param(idx, GL_DIFFUSE, r, g, b);
nuclear@0 21 set_light_param(idx, GL_SPECULAR, r, g, b);
nuclear@0 22 }
nuclear@0 23
nuclear@0 24 void set_light_attenuation(int idx, float constant, float linear, float quad)
nuclear@0 25 {
nuclear@0 26 glLightf(GL_LIGHT0 + idx, GL_CONSTANT_ATTENUATION, constant);
nuclear@0 27 glLightf(GL_LIGHT0 + idx, GL_LINEAR_ATTENUATION, linear);
nuclear@0 28 glLightf(GL_LIGHT0 + idx, GL_QUADRATIC_ATTENUATION, quad);
nuclear@0 29 }
nuclear@0 30
nuclear@0 31
nuclear@0 32 void set_mtl_diffuse(float r, float g, float b, float a)
nuclear@0 33 {
nuclear@0 34 float color[4];
nuclear@0 35 color[0] = r;
nuclear@0 36 color[1] = g;
nuclear@0 37 color[2] = b;
nuclear@0 38 color[3] = a;
nuclear@0 39 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color);
nuclear@0 40 }
nuclear@0 41
nuclear@0 42 void set_mtl_specular(float r, float g, float b)
nuclear@0 43 {
nuclear@0 44 float color[4];
nuclear@0 45 color[0] = r;
nuclear@0 46 color[1] = g;
nuclear@0 47 color[2] = b;
nuclear@0 48 color[3] = 1.0f;
nuclear@0 49 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color);
nuclear@0 50 }
nuclear@0 51
nuclear@0 52 void set_mtl_shininess(float shin)
nuclear@0 53 {
nuclear@0 54 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin > 128.0 ? 128.0 : shin);
nuclear@0 55 }
nuclear@0 56
nuclear@0 57
nuclear@0 58 void set_mtl_emission(float r, float g, float b)
nuclear@0 59 {
nuclear@0 60 float color[4];
nuclear@0 61 color[0] = r;
nuclear@0 62 color[1] = g;
nuclear@0 63 color[2] = b;
nuclear@0 64 color[3] = 1.0f;
nuclear@0 65 glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, color);
nuclear@0 66 }