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, j, num, nfaces;
  38         int *idxarr;
  39         float *varr, *narr, *uvarr;
  40         float xform[16];
  41
  42         if(!(gscn = goat3d_create()) || goat3d_load(gscn, "data/track1.g3d")) {
  43                 return -1;
  44         }
  45
  46         dlist = glGenLists(1);
  47         glNewList(dlist, GL_COMPILE);
  48         num = goat3d_get_node_count(gscn);
  49         for(i=0; i<num; i++) {
  50                 struct goat3d_node *node = goat3d_get_node(gscn, i);
  51                 if(goat3d_get_node_type(node) == GOAT3D_NODE_MESH) {
  52                         struct goat3d_mesh *mesh = goat3d_get_node_object(node);
  53
  54                         goat3d_get_node_matrix(node, xform);
  55                         glPushMatrix();
  56                         glMultMatrixf(xform);
  57
  58                         varr = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_VERTEX);
  59                         narr = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_NORMAL);
  60                         uvarr = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_TEXCOORD);
  61
  62                         glEnableClientState(GL_VERTEX_ARRAY);
  63                         glVertexPointer(3, GL_FLOAT, 0, varr);
  64
  65                         if(narr) {
  66                                 glEnableClientState(GL_NORMAL_ARRAY);
  67                                 glNormalPointer(GL_FLOAT, 0, narr);
  68                         }
  69                         if(uvarr) {
  70                                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  71                                 glTexCoordPointer(2, GL_FLOAT, 0, uvarr);
  72                         }
  73
  74                         nfaces = goat3d_get_mesh_face_count(mesh);
  75                         idxarr = goat3d_get_mesh_faces(mesh);
  76                         glDrawElements(GL_TRIANGLES, nfaces * 3, GL_UNSIGNED_INT, idxarr);
  77
  78                         glDisableClientState(GL_VERTEX_ARRAY);
  79                         glDisableClientState(GL_NORMAL_ARRAY);
  80                         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
  81
  82                         glPopMatrix();
  83                 }
  84         }
  85         glEndList();
  86
  87         return 0;
  88 }
  89
  90 static void gdestroy(void)
  91 {
  92         goat3d_free(gscn);
  93 }
  94
  95 static int gstart(void)
  96 {
  97         return 0;
  98 }
  99
 100 static void gstop(void)
 101 {
 102 }
 103
 104 static void gdisplay(void)
 105 {
 106         glMatrixMode(GL_MODELVIEW);
 107         glLoadIdentity();
 108         glTranslatef(0, 0, -cam_dist);
 109         glRotatef(cam_phi, 1, 0, 0);
 110         glRotatef(cam_theta, 0, 1, 0);
 111         glTranslatef(cam_pan[0], cam_pan[1], cam_pan[2]);
 112
 113         glCallList(dlist);
 114 }
 115
 116 static void greshape(int x, int y)
 117 {
 118 }
 119
 120 static void gkeyb(int key, int press)
 121 {
 122 }
 123
 124 static void gmouse(int bn, int press, int x, int y)
 125 {
 126 }
 127
 128 static void gmotion(int x, int y)
 129 {
 130         int dx = x - mouse_x;
 131         int dy = y - mouse_y;
 132
 133         if(!(dx | dy)) return;
 134
 135         if(mouse_state[0]) {
 136                 cam_theta += dx * 0.5;
 137                 cam_phi += dy * 0.5;
 138                 if(cam_phi < -90) cam_phi = -90;
 139                 if(cam_phi > 90) cam_phi = 90;
 140         }
 141         if(mouse_state[1]) {
 142                 float up[3], right[3];
 143                 float theta = cam_theta * M_PI / 180.0f;
 144                 float phi = cam_phi * M_PI / 180.0f;
 145
 146                 up[0] = -sin(theta) * sin(phi);
 147                 up[1] = -cos(phi);
 148                 up[2] = cos(theta) * sin(phi);
 149                 right[0] = cos(theta);
 150                 right[1] = 0;
 151                 right[2] = sin(theta);
 152
 153                 cam_pan[0] += (right[0] * dx + up[0] * dy) * 0.01;
 154                 cam_pan[1] += up[1] * dy * 0.01;
 155                 cam_pan[2] += (right[2] * dx + up[2] * dy) * 0.01;
 156         }
 157         if(mouse_state[2]) {
 158                 cam_dist += dy * 0.1;
 159                 if(cam_dist < 0) cam_dist = 0;
 160         }
 161 }