render.c

   1 #include <GL/glut.h>
   2
   3 #include "render.h"
   4 #include "typedefs.h"
   5
   6 const float AXIS_RADIUS = 5.0f;
   7
   8 void render_scene() {
   9         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  10         glLoadIdentity();
  11
  12         draw_axes();
  13
  14         glFlush();
  15         glutSwapBuffers();
  16 }
  17
  18 void draw_axes() {
  19         point3f x_axis_start = { 0.0f, 0.0f, 0.0f };
  20         point3f x_axis_end = { AXIS_RADIUS, 0.0f, 0.0f };
  21         point3f y_axis_start = { 0.0f, 0.0f, 0.0f };
  22         point3f y_axis_end = { 0.0f, AXIS_RADIUS, 0.0f };
  23         point3f z_axis_start = { 0.0f, 0.0f, 0.0f };
  24         point3f z_axis_end = { 0.0f, 0.0f, AXIS_RADIUS };
  25
  26         glColor3f(1.0f, 0.0f, 0.0f);
  27         glBegin(GL_LINES);
  28         glVertex3fv(x_axis_start);
  29         glVertex3fv(x_axis_end);
  30         glEnd();
  31
  32         glColor3f(0.0f, 1.0f, 0.0f);
  33         glBegin(GL_LINES);
  34         glVertex3fv(y_axis_start);
  35         glVertex3fv(y_axis_end);
  36         glEnd();
  37
  38         glColor3f(0.0f, 0.0f, 1.0f);
  39         glBegin(GL_LINES);
  40         glVertex3fv(z_axis_start);
  41         glVertex3fv(z_axis_end);
  42         glEnd();
  43 }