git.mutantstargoat.com Git - vrlugburz/blob - src/game.c

   1 #include <stdio.h>
   2 #include <assert.h>
   3 #include "cgmath/cgmath.h"
   4 #include "game.h"
   5 #include "opengl.h"
   6 #include "level.h"
   7 #include "player.h"
   8 #include "scenefile.h"
   9 #include "sdr.h"
  10
  11 static void draw_level(void);
  12
  13 struct level lvl;
  14 struct player player;
  15
  16 int win_width, win_height;
  17 float win_aspect;
  18 int mouse_x, mouse_y;
  19 int bnstate[8];
  20
  21 float cam_dist = 10;
  22 float view_matrix[16], proj_matrix[16];
  23
  24 unsigned int sdr_foo;
  25
  26 int game_init(void)
  27 {
  28         if(init_opengl() == -1) {
  29                 return -1;
  30         }
  31
  32         glEnable(GL_DEPTH_TEST);
  33         glEnable(GL_CULL_FACE);
  34
  35         if(!(sdr_foo = create_program_load("sdr/foo.v.glsl", "sdr/foo.p.glsl"))) {
  36                 return -1;
  37         }
  38         glBindAttribLocation(sdr_foo, MESH_ATTR_VERTEX, "apos");
  39         glBindAttribLocation(sdr_foo, MESH_ATTR_NORMAL, "anorm");
  40         glBindAttribLocation(sdr_foo, MESH_ATTR_TANGENT, "atang");
  41         glBindAttribLocation(sdr_foo, MESH_ATTR_TEXCOORD, "atex");
  42         link_program(sdr_foo);
  43
  44         if(load_level(&lvl, "data/test.lvl") == -1) {
  45                 return -1;
  46         }
  47         gen_level_geom(&lvl);
  48
  49         init_player(&player);
  50         player.lvl = &lvl;
  51         player.cx = lvl.px;
  52         player.cy = lvl.py;
  53
  54         printf("start pos: %d,%d\n", player.cx, player.cy);
  55
  56         return 0;
  57 }
  58
  59 void game_shutdown(void)
  60 {
  61         destroy_level(&lvl);
  62         free_program(sdr_foo);
  63 }
  64
  65 void game_display(void)
  66 {
  67         glClearColor(0.1, 0.1, 0.1, 1);
  68         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  69
  70         cgm_midentity(proj_matrix);
  71         cgm_mperspective(proj_matrix, cgm_deg_to_rad(50), win_aspect, 0.5, 500.0);
  72         glMatrixMode(GL_PROJECTION);
  73         glLoadMatrixf(proj_matrix);
  74
  75         upd_player_xform(&player);
  76         glMatrixMode(GL_MODELVIEW);
  77         glLoadMatrixf(player.view_xform);
  78
  79         draw_level();
  80
  81         game_swap_buffers();
  82         assert(glGetError() == GL_NO_ERROR);
  83 }
  84
  85 static void draw_level(void)
  86 {
  87         int i, j, k;
  88         struct cell *cell;
  89         float xform[16];
  90
  91         glUseProgram(sdr_foo);
  92
  93         cell = lvl.cells;
  94         for(i=0; i<lvl.height; i++) {
  95                 for(j=0; j<lvl.width; j++) {
  96                         cgm_mtranslation(xform, j * lvl.cell_size, 0, i * lvl.cell_size);
  97
  98                         glPushMatrix();
  99                         glMultMatrixf(xform);
 100
 101                         for(k=0; k<cell->num_mgrp; k++) {
 102                                 draw_meshgroup(cell->mgrp + k);
 103                         }
 104                         cell++;
 105
 106                         glPopMatrix();
 107                 }
 108         }
 109
 110         glUseProgram(0);
 111 }
 112
 113 void game_reshape(int x, int y)
 114 {
 115         glViewport(0, 0, x, y);
 116         win_width = x;
 117         win_height = y;
 118         win_aspect = (float)x / (float)y;
 119 }
 120
 121 void game_keyboard(int key, int press)
 122 {
 123         if(press && key == 27) {
 124                 game_quit();
 125                 return;
 126         }
 127 }
 128
 129 void game_mbutton(int bn, int press, int x, int y)
 130 {
 131         bnstate[bn] = press;
 132         mouse_x = x;
 133         mouse_y = y;
 134 }
 135
 136 void game_mmotion(int x, int y)
 137 {
 138         int dx = x - mouse_x;
 139         int dy = y - mouse_y;
 140         mouse_x = x;
 141         mouse_y = y;
 142
 143         if(!(dx | dy)) return;
 144
 145         if(bnstate[0]) {
 146                 player.theta -= cgm_deg_to_rad(dx * 0.5f);
 147                 player.phi -= cgm_deg_to_rad(dy * 0.5f);
 148                 if(player.phi < -M_PI/2) player.phi = -M_PI/2;
 149                 if(player.phi > M_PI/2) player.phi = M_PI/2;
 150         }
 151         if(bnstate[2]) {
 152                 cam_dist += dy * 0.1;
 153                 if(cam_dist < 0) cam_dist = 0;
 154         }
 155 }