git.mutantstargoat.com Git - vrfileman/blob - src/app.cc

   1 #include <stdio.h>
   2 #include <assert.h>
   3 #include "opengl.h"
   4 #include "app.h"
   5 #include "gmath/gmath.h"
   6 #include "mesh.h"
   7 #include "meshgen.h"
   8 #include "sdr.h"
   9 #include "texture.h"
  10
  11 int win_width, win_height;
  12 float win_aspect;
  13 long time_msec;
  14
  15 static float cam_theta, cam_phi;
  16 static Mesh *mesh_torus;
  17 static Texture *tex_grid;
  18
  19 static bool bnstate[16];
  20 static int prev_x, prev_y;
  21
  22 static unsigned int sdr_grid;
  23
  24 bool app_init(int argc, char **argv)
  25 {
  26         if(init_opengl() == -1) {
  27                 return false;
  28         }
  29
  30         glEnable(GL_MULTISAMPLE);
  31
  32         int aasamples = 0;
  33         glGetIntegerv(GL_SAMPLES, &aasamples);
  34         printf("got %d samples per pixel\n", aasamples);
  35
  36         glEnable(GL_CULL_FACE);
  37         glEnable(GL_DEPTH_TEST);
  38         //glEnable(GL_LIGHTING);
  39         glEnable(GL_LIGHT0);
  40
  41         Mesh::use_custom_sdr_attr = false;
  42
  43         mesh_torus = new Mesh;
  44         gen_torus(mesh_torus, 1.0, 0.25, 32, 32);
  45
  46         if(!(sdr_grid = create_program_load("sdr/grid.v.glsl", "sdr/grid.p.glsl"))) {
  47                 return false;
  48         }
  49         if(!(tex_grid = load_texture("data/purple_grid.png"))) {
  50                 delete tex_grid;
  51                 return false;
  52         }
  53
  54         return true;
  55 }
  56
  57 void app_cleanup()
  58 {
  59 }
  60
  61 void app_draw()
  62 {
  63         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  64
  65         Mat4 view_mat;
  66         view_mat.pre_rotate_x(deg_to_rad(cam_phi));
  67         view_mat.pre_rotate_y(deg_to_rad(cam_theta));
  68         view_mat.pre_translate(0, -1.65, 0);
  69         glMatrixMode(GL_MODELVIEW);
  70         glLoadMatrixf(view_mat[0]);
  71
  72         //mesh_torus->draw();
  73
  74         Mat4 xform;
  75         xform.scaling(500.0);
  76         glPushMatrix();
  77         glMultMatrixf(xform[0]);
  78
  79         bind_program(sdr_grid);
  80         bind_texture(tex_grid);
  81
  82         glBegin(GL_QUADS);
  83         glNormal3f(0, 1, 0);
  84         glVertex3f(-1, 0, 1);
  85         glVertex3f(1, 0, 1);
  86         glVertex3f(1, 0, -1);
  87         glVertex3f(-1, 0, -1);
  88         glEnd();
  89
  90         bind_texture(0);
  91         bind_program(0);
  92
  93         glPopMatrix();
  94
  95         app_swap_buffers();
  96         assert(glGetError() == GL_NO_ERROR);
  97 }
  98
  99 void app_reshape(int x, int y)
 100 {
 101         glViewport(0, 0, x, y);
 102
 103         Mat4 mat;
 104         mat.perspective(deg_to_rad(50), win_aspect, 0.5, 500.0);
 105
 106         glMatrixMode(GL_PROJECTION);
 107         glLoadMatrixf(mat[0]);
 108 }
 109
 110 void app_keyboard(int key, bool pressed)
 111 {
 112         if(pressed) {
 113                 switch(key) {
 114                 case 27:
 115                         app_quit();
 116                         break;
 117                 }
 118         }
 119 }
 120
 121 void app_mouse_button(int bn, bool pressed, int x, int y)
 122 {
 123         bnstate[bn] = pressed;
 124         prev_x = x;
 125         prev_y = y;
 126 }
 127
 128 void app_mouse_motion(int x, int y)
 129 {
 130         int dx = x - prev_x;
 131         int dy = y - prev_y;
 132         prev_x = x;
 133         prev_y = y;
 134
 135         if(!dx && !dy) return;
 136
 137         if(bnstate[0]) {
 138                 cam_theta += dx * 0.5;
 139                 cam_phi += dy * 0.5;
 140
 141                 if(cam_phi < -90) cam_phi = -90;
 142                 if(cam_phi > 90) cam_phi = 90;
 143         }
 144         app_redraw();
 145 }