git.mutantstargoat.com Git - deeprace/blob - src/scr_game.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <math.h>
   4 #include <GL/gl.h>
   5 #include "miniglut.h"
   6 #include "game.h"
   7 #include "util.h"
   8 #include "goat3d.h"
   9
  10 static int ginit(void);
  11 static void gdestroy(void);
  12 static int gstart(void);
  13 static void gstop(void);
  14 static void gdisplay(void);
  15 static void greshape(int x, int y);
  16 static void gkeyb(int key, int press);
  17 static void gmouse(int bn, int press, int x, int y);
  18 static void gmotion(int x, int y);
  19
  20 struct game_screen scr_game = {
  21         "game",
  22         ginit, gdestroy,
  23         gstart, gstop,
  24         gdisplay, greshape,
  25         gkeyb, gmouse, gmotion
  26 };
  27
  28 static float cam_theta, cam_phi = 20, cam_dist = 10;
  29 static float cam_pan[3];
  30
  31 static struct goat3d *gscn;
  32 static int dlist;
  33
  34
  35 static int ginit(void)
  36 {
  37         int i, num, nfaces;
  38
  39         if(!(gscn = goat3d_create()) || goat3d_load(gscn, "data/track1.g3d")) {
  40                 return -1;
  41         }
  42
  43         dlist = glGenLists(1);
  44         glNewList(dlist, GL_COMPILE);
  45         num = goat3d_get_node_count(gscn);
  46         for(i=0; i<num; i++) {
  47                 struct goat3d_node *node = goat3d_get_node(gscn, i);
  48                 if(goat3d_get_node_type(node) == GOAT3D_NODE_MESH) {
  49                         struct goat3d_mesh *mesh = goat3d_get_node_object(node);
  50
  51                         glEnableClientState(GL_VERTEX_ARRAY);
  52                         glVertexPointer(3, GL_FLOAT, 0, goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_VERTEX));
  53
  54                         if(goat3d_get_mesh_attrib_count(mesh, GOAT3D_MESH_ATTR_NORMAL)) {
  55                                 glEnableClientState(GL_NORMAL_ARRAY);
  56                                 glNormalPointer(GL_FLOAT, 0, goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_NORMAL));
  57                         }
  58                         if(goat3d_get_mesh_attrib_count(mesh, GOAT3D_MESH_ATTR_TEXCOORD)) {
  59                                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  60                                 glTexCoordPointer(2, GL_FLOAT, 0, goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_TEXCOORD));
  61                         }
  62
  63                         nfaces = goat3d_get_mesh_face_count(mesh) / 3;
  64                         glDrawElements(GL_TRIANGLES, nfaces * 3, GL_UNSIGNED_INT, goat3d_get_mesh_faces(mesh));
  65
  66                         glDisableClientState(GL_VERTEX_ARRAY);
  67                         glDisableClientState(GL_NORMAL_ARRAY);
  68                         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
  69                 }
  70         }
  71         glEndList();
  72
  73         return 0;
  74 }
  75
  76 static void gdestroy(void)
  77 {
  78         goat3d_free(gscn);
  79 }
  80
  81 static int gstart(void)
  82 {
  83         return 0;
  84 }
  85
  86 static void gstop(void)
  87 {
  88 }
  89
  90 static void gdisplay(void)
  91 {
  92         glMatrixMode(GL_MODELVIEW);
  93         glLoadIdentity();
  94         glTranslatef(0, 0, -cam_dist);
  95         glRotatef(cam_phi, 1, 0, 0);
  96         glRotatef(cam_theta, 0, 1, 0);
  97         glTranslatef(cam_pan[0], cam_pan[1], cam_pan[2]);
  98
  99         glCallList(dlist);
 100 }
 101
 102 static void greshape(int x, int y)
 103 {
 104 }
 105
 106 static void gkeyb(int key, int press)
 107 {
 108 }
 109
 110 static void gmouse(int bn, int press, int x, int y)
 111 {
 112 }
 113
 114 static void gmotion(int x, int y)
 115 {
 116         int dx = x - mouse_x;
 117         int dy = y - mouse_y;
 118
 119         if(!(dx | dy)) return;
 120
 121         if(mouse_state[0]) {
 122                 cam_theta += dx * 0.5;
 123                 cam_phi += dy * 0.5;
 124                 if(cam_phi < -90) cam_phi = -90;
 125                 if(cam_phi > 90) cam_phi = 90;
 126         }
 127         if(mouse_state[1]) {
 128                 float up[3], right[3];
 129                 float theta = cam_theta * M_PI / 180.0f;
 130                 float phi = cam_phi * M_PI / 180.0f;
 131
 132                 up[0] = -sin(theta) * sin(phi);
 133                 up[1] = -cos(phi);
 134                 up[2] = cos(theta) * sin(phi);
 135                 right[0] = cos(theta);
 136                 right[1] = 0;
 137                 right[2] = sin(theta);
 138
 139                 cam_pan[0] += (right[0] * dx + up[0] * dy) * 0.01;
 140                 cam_pan[1] += up[1] * dy * 0.01;
 141                 cam_pan[2] += (right[2] * dx + up[2] * dy) * 0.01;
 142         }
 143         if(mouse_state[2]) {
 144                 cam_dist += dy * 0.1;
 145                 if(cam_dist < 0) cam_dist = 0;
 146         }
 147 }