glut_janitor.c

   1 #include <GL/gl.h>
   2
   3 #include "render.h"
   4 #include "tga.h"
   5
   6 void initRender() {
   7         // Set the clear colour to black
   8         glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
   9
  10         GLfloat light0_ambient[] = {0.1f, 0.1f, 0.1f, 1.0f};
  11         GLfloat light0_diffuse[] = {1.0f, 1.0f, 1.0f, 1.0f};
  12         GLfloat light0_specular[] = {1.0f, 1.0f, 1.0f, 1.0f};
  13         GLfloat light0_position[] = {0.0f, 0.0f, 10.0f, 1.0f};
  14
  15         glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient);
  16         glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse);
  17         glLightfv(GL_LIGHT0, GL_SPECULAR, light0_specular);
  18         glLightfv(GL_LIGHT0, GL_POSITION, light0_position);
  19
  20         glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 1.0f);
  21         glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05f);
  22         glLightf(GL_LIGHT0, GL_QUADRATIC_ATTENUATION, 0.001f);
  23
  24         texImage = readTga("out/assets/wall01side.tga");
  25         glTexImage2D(GL_TEXTURE_2D,
  26                      0,
  27                      texImage->imageComponents,
  28                      texImage->header.imageWidth,
  29                      texImage->header.imageHeight,
  30                      0,
  31                      texImage->imageFormat,
  32                      GL_UNSIGNED_BYTE,
  33                      texImage->bytes);
  34         free(texImage->bytes);
  35
  36         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
  37         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  38         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  39 }
  40
  41 void resizeStage(GLsizei width, GLsizei height) {
  42         if (height == 0)
  43                 height = 1;
  44
  45         // Set device viewport dimensions
  46         glViewport(0, 0, width, height);
  47         // Switch to projection matrix
  48         glMatrixMode(GL_PROJECTION);
  49         // Reset the projection matrix
  50         glLoadIdentity();
  51
  52         GLfloat aspectRatio = (GLfloat) width / (GLfloat) height;
  53
  54         glOrtho(-10.0, 10.0, -10.0/aspectRatio, 10.0/aspectRatio, 128.0, -128.0);
  55
  56         glRotatef(45.0f, 1.0f, 0.0f, 0.0f);
  57         glRotatef(45.0f, 0.0f, 1.0f, 0.0f);
  58
  59         glMatrixMode(GL_MODELVIEW);
  60 }