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 #include "input.h"
  10 #include "cgmath/cgmath.h"
  11
  12 static int ginit(void);
  13 static void gdestroy(void);
  14 static int gstart(void);
  15 static void gstop(void);
  16 static void gdisplay(void);
  17 static void greshape(int x, int y);
  18 static void gkeyb(int key, int press);
  19 static void gmouse(int bn, int press, int x, int y);
  20 static void gmotion(int x, int y);
  21
  22 static void set_light_dir(int idx, float x, float y, float z);
  23 static void set_light_color(int idx, float r, float g, float b, float s);
  24
  25
  26 struct game_screen scr_game = {
  27         "game",
  28         ginit, gdestroy,
  29         gstart, gstop,
  30         gdisplay, greshape,
  31         gkeyb, gmouse, gmotion
  32 };
  33
  34 static float cam_theta, cam_phi = 20, cam_dist;
  35 static cgm_vec3 cam_pan;
  36
  37 static struct goat3d *gscn;
  38 static int dlist;
  39
  40
  41 static int ginit(void)
  42 {
  43         int i, num, nfaces;
  44         int *idxarr;
  45         float *varr, *narr, *uvarr;
  46         float xform[16];
  47
  48         if(!(gscn = goat3d_create()) || goat3d_load(gscn, "data/level1.g3d")) {
  49                 return -1;
  50         }
  51
  52         dlist = glGenLists(1);
  53         glNewList(dlist, GL_COMPILE);
  54         num = goat3d_get_node_count(gscn);
  55         for(i=0; i<num; i++) {
  56                 struct goat3d_node *node = goat3d_get_node(gscn, i);
  57                 if(match_prefix(goat3d_get_node_name(node), "portal_")) {
  58                         continue;
  59                 }
  60                 if(goat3d_get_node_type(node) == GOAT3D_NODE_MESH) {
  61                         struct goat3d_mesh *mesh = goat3d_get_node_object(node);
  62
  63                         goat3d_get_node_matrix(node, xform);
  64                         glPushMatrix();
  65                         glMultMatrixf(xform);
  66
  67                         varr = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_VERTEX);
  68                         narr = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_NORMAL);
  69                         uvarr = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_TEXCOORD);
  70
  71                         glEnableClientState(GL_VERTEX_ARRAY);
  72                         glVertexPointer(3, GL_FLOAT, 0, varr);
  73
  74                         if(narr) {
  75                                 glEnableClientState(GL_NORMAL_ARRAY);
  76                                 glNormalPointer(GL_FLOAT, 0, narr);
  77                         }
  78                         if(uvarr) {
  79                                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  80                                 glTexCoordPointer(2, GL_FLOAT, 0, uvarr);
  81                         }
  82
  83                         nfaces = goat3d_get_mesh_face_count(mesh);
  84                         idxarr = goat3d_get_mesh_faces(mesh);
  85                         glDrawElements(GL_TRIANGLES, nfaces * 3, GL_UNSIGNED_INT, idxarr);
  86
  87                         glDisableClientState(GL_VERTEX_ARRAY);
  88                         glDisableClientState(GL_NORMAL_ARRAY);
  89                         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
  90
  91                         glPopMatrix();
  92                 }
  93         }
  94         glEndList();
  95
  96         return 0;
  97 }
  98
  99 static void gdestroy(void)
 100 {
 101         goat3d_free(gscn);
 102 }
 103
 104 static int gstart(void)
 105 {
 106         float amb[] = {0.25, 0.25, 0.25, 1};
 107
 108         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, amb);
 109
 110         set_light_color(0, 1, 1, 1, 0.8);
 111         glEnable(GL_LIGHT0);
 112         set_light_color(1, 1, 0.6, 0.5, 0.2);
 113         glEnable(GL_LIGHT1);
 114         set_light_color(2, 0.5, 0.6, 1, 0.3);
 115         glEnable(GL_LIGHT2);
 116         return 0;
 117 }
 118
 119 static void gstop(void)
 120 {
 121 }
 122
 123 #define TSTEP   (1.0f / 30.0f)
 124
 125 static void gupdate(void)
 126 {
 127         if(inpstate & INP_MOVE_BITS) {
 128                 cgm_vec3 fwd, right;
 129                 float theta = cam_theta * M_PI / 180.0f;
 130                 float phi = cam_phi * M_PI / 180.0f;
 131
 132                 float dx = 0, dy = 0;
 133
 134                 fwd.x = -sin(theta) * cos(phi);
 135                 fwd.y = sin(phi);
 136                 fwd.z = cos(theta) * cos(phi);
 137                 right.x = cos(theta);
 138                 right.y = 0;
 139                 right.z = sin(theta);
 140
 141                 if(inpstate & INP_FWD_BIT) {
 142                         dy += 0.1;
 143                 }
 144                 if(inpstate & INP_BACK_BIT) {
 145                         dy -= 0.1;
 146                 }
 147                 if(inpstate & INP_RIGHT_BIT) {
 148                         dx -= 0.1;
 149                 }
 150                 if(inpstate & INP_LEFT_BIT) {
 151                         dx += 0.1;
 152                 }
 153
 154                 cam_pan.x += right.x * dx + fwd.x * dy;
 155                 cam_pan.y += fwd.y * dy;
 156                 cam_pan.z += right.z * dx + fwd.z * dy;
 157         }
 158 }
 159
 160 static void gdisplay(void)
 161 {
 162         static long prev_msec;
 163         static float tm_acc;
 164         long msec;
 165
 166         msec = glutGet(GLUT_ELAPSED_TIME);
 167         tm_acc += (float)(msec - prev_msec) / 1000.0f;
 168         prev_msec = msec;
 169
 170         while(tm_acc >= TSTEP) {
 171                 gupdate();
 172                 tm_acc -= TSTEP;
 173         }
 174
 175         glMatrixMode(GL_MODELVIEW);
 176         glLoadIdentity();
 177         glTranslatef(0, 0, -cam_dist);
 178         glRotatef(cam_phi, 1, 0, 0);
 179         glRotatef(cam_theta, 0, 1, 0);
 180         glTranslatef(cam_pan.x, cam_pan.y, cam_pan.z);
 181
 182         set_light_dir(0, -1, 1, 5);
 183         set_light_dir(1, 5, 0, 3);
 184         set_light_dir(2, -0.5, -2, -3);
 185
 186         glCallList(dlist);
 187 }
 188
 189 static void greshape(int x, int y)
 190 {
 191 }
 192
 193 static void gkeyb(int key, int press)
 194 {
 195         int i;
 196
 197         for(i=0; i<MAX_INPUTS; i++) {
 198                 if(inpmap[i].key == key) {
 199                         if(press) {
 200                                 inpstate |= 1 << inpmap[i].inp;
 201                         } else {
 202                                 inpstate &= ~(1 << inpmap[i].inp);
 203                         }
 204                         break;
 205                 }
 206         }
 207 }
 208
 209 static void gmouse(int bn, int press, int x, int y)
 210 {
 211 }
 212
 213 static void gmotion(int x, int y)
 214 {
 215         int dx = x - mouse_x;
 216         int dy = y - mouse_y;
 217
 218         if(!(dx | dy)) return;
 219
 220         if(mouse_state[0]) {
 221                 cam_theta += dx * 0.5;
 222                 cam_phi += dy * 0.5;
 223                 if(cam_phi < -90) cam_phi = -90;
 224                 if(cam_phi > 90) cam_phi = 90;
 225         }
 226         /*
 227         if(mouse_state[1]) {
 228                 float up[3], right[3];
 229                 float theta = cam_theta * M_PI / 180.0f;
 230                 float phi = cam_phi * M_PI / 180.0f;
 231
 232                 up[0] = -sin(theta) * sin(phi);
 233                 up[1] = -cos(phi);
 234                 up[2] = cos(theta) * sin(phi);
 235                 right[0] = cos(theta);
 236                 right[1] = 0;
 237                 right[2] = sin(theta);
 238
 239                 cam_pan[0] += (right[0] * dx + up[0] * dy) * 0.01;
 240                 cam_pan[1] += up[1] * dy * 0.01;
 241                 cam_pan[2] += (right[2] * dx + up[2] * dy) * 0.01;
 242         }
 243         */
 244         if(mouse_state[2]) {
 245                 cam_dist += dy * 0.1;
 246                 if(cam_dist < 0) cam_dist = 0;
 247         }
 248 }
 249
 250 static void set_light_dir(int idx, float x, float y, float z)
 251 {
 252         float pos[4];
 253         pos[0] = x;
 254         pos[1] = y;
 255         pos[2] = z;
 256         pos[3] = 0;
 257         glLightfv(GL_LIGHT0 + idx, GL_POSITION, pos);
 258 }
 259
 260 static void set_light_color(int idx, float r, float g, float b, float s)
 261 {
 262         float color[4];
 263         color[0] = r * s;
 264         color[1] = g * s;
 265         color[2] = b * s;
 266         color[3] = 1;
 267         glLightfv(GL_LIGHT0 + idx, GL_DIFFUSE, color);
 268         glLightfv(GL_LIGHT0 + idx, GL_SPECULAR, color);
 269 }
 270