conworlds: c2eecf764daa src/game.cc

conworlds

view src/game.cc @ 9:c2eecf764daa

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author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 22 Aug 2014 18:48:25 +0300
parents	90abf4b93cc9
children	5dc4e2b8f6f5

line source

1 #include "game.h"

2 #include "opengl.h"

3 #include "camera.h"

4 #include "texture.h"

5 #include "vr/vr.h"

7 static void game_render_eye(int eye);

8 static void draw_scene();

9 static bool setup_rtarg(int x, int y);

11 static Texture *rtarg;

12 static unsigned int fbo, rtarg_depth;

13 static int rtwidth, rtheight;

15 static const float move_speed = 10.0f;

17 static int fb_width, fb_height;

18 static FlyCamera cam;

19 static Texture floor_tex;

20 static bool keystate[256];

22 bool game_init()

23 {

24 vr_init();

26 glEnable(GL_DEPTH_TEST);

27 glEnable(GL_CULL_FACE);

28 glEnable(GL_LIGHTING);

29 glEnable(GL_LIGHT0);

31 glClearColor(0.1, 0.1, 0.1, 1);

34 if(!floor_tex.load("data/tiles.png")) {

35 return false;

36 }

38 cam.input_move(0, 0, 5);

39 return true;

40 }

42 void game_cleanup()

43 {

44 floor_tex.destroy();

45 vr_shutdown();

47 if(fbo) {

48 glDeleteFramebuffers(1, &fbo);

49 glDeleteRenderbuffers(1, &rtarg_depth);

50 delete rtarg;

51 }

52 }

54 void game_update(unsigned int msec)

55 {

56 static unsigned int prev_msec;

57 float dt = (msec - prev_msec) / 1000.0f;

58 float offs = dt * move_speed;

59 prev_msec = msec;

61 Vector3 move;

62 float roll = 0.0f;

64 if(keystate['d'] || keystate['D']) {

65 move.x += offs;

66 }

67 if(keystate['a'] || keystate['A']) {

68 move.x -= offs;

69 }

70 if(keystate['s'] || keystate['S']) {

71 move.z += offs;

72 }

73 if(keystate['w'] || keystate['W']) {

74 move.z -= offs;

75 }

76 if(keystate['e'] || keystate['E']) {

77 roll += dt;

78 }

79 if(keystate['q'] || keystate['Q']) {

80 roll -= dt;

81 }

83 cam.input_move(move.x, move.y, move.z);

84 cam.input_rotate(0, 0, roll);

85 }

87 void game_render()

88 {

89 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

90 glClearColor(1, 0, 0, 1);

91 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

93 glViewport(0, 0, rtwidth / 2.0, rtheight);

94 vr_begin(VR_EYE_LEFT);

95 game_render_eye(-1);

96 vr_end();

98 glViewport(rtwidth / 2, 0, rtwidth / 2.0, rtheight);

99 vr_begin(VR_EYE_RIGHT);

100 game_render_eye(1);

101 vr_end();

102

103 glBindFramebuffer(GL_FRAMEBUFFER, 0);

104 glViewport(0, 0, fb_width, fb_height);

105

106 vr_output_texture(rtarg->get_texture_id(), 0, 0, (float)rtwidth / (float)rtarg->get_width(),

107 (float)rtheight / (float)rtarg->get_height());

108

109 vr_swap_buffers();

110 }

111

112 static void game_render_eye(int eye)

113 {

114 float mat[16];

115 Matrix4x4 view_matrix = cam.get_matrix().inverse();

116

117 glMatrixMode(GL_PROJECTION);

118 glLoadIdentity();

119 //if(eye == 0 || !vr_proj_matrix(eye < 0 ? 0 : 1, 0.5, 500.0, mat)) {

120 gluPerspective(60.0, (float)fb_width / (float)fb_height, 0.5, 500.0);

121 /*} else {

122 glLoadMatrixf(mat);

123 }*/

124

125 glMatrixMode(GL_MODELVIEW);

126 //if(eye == 0 || !vr_view_matrix(eye < 0 ? 0 : 1, mat)) {

127 glLoadIdentity();

128 /*} else {

129 glLoadTransposeMatrixf(mat);

130 }*/

131 glMultTransposeMatrixf(view_matrix[0]);

132

133 draw_scene();

134 }

135

136 void game_reshape(int x, int y)

137 {

138 glViewport(0, 0, x, y);

139 fb_width = x;

140 fb_height = y;

141

142 int lxres = vr_get_opti(VR_OPT_LEYE_XRES);

143 if(lxres) {

144 int lyres = vr_get_opti(VR_OPT_LEYE_YRES);

145 int rxres = vr_get_opti(VR_OPT_REYE_XRES);

146 int ryres = vr_get_opti(VR_OPT_REYE_YRES);

147

148 rtwidth = lxres + rxres;

149 rtheight = lyres > ryres ? lyres : ryres;

150 } else {

151 rtwidth = x;

152 rtheight = y;

153 }

154

155 setup_rtarg(rtwidth, rtheight);

156 }

157

158 void game_keyboard(int key, bool pressed, int x, int y)

159 {

160 if(pressed) {

161 switch(key) {

162 case 27:

163 exit(0);

164

165 case ' ':

166 vr_recenter();

167 break;

168 }

169 }

170

171 if(key < 256) {

172 keystate[key] = pressed;

173 }

174 }

175

176 static int prev_x, prev_y;

177 static bool bnstate[32];

178

179 void game_mouse(int bn, bool pressed, int x, int y)

180 {

181 bnstate[bn] = pressed;

182 prev_x = x;

183 prev_y = y;

184 }

185

186 void game_motion(int x, int y)

187 {

188 int dx = x - prev_x;

189 int dy = y - prev_y;

190 prev_x = x;

191 prev_y = y;

192

193 if(!dx && !dy) return;

194

195 if(bnstate[0]) {

196 float xrot = dy * 0.5;

197 float yrot = dx * 0.5;

198 cam.input_rotate(DEG_TO_RAD(xrot), 0, 0);

199 cam.input_rotate(0, DEG_TO_RAD(yrot), 0);

200 }

201 }

202

203 void game_mwheel(int dir)

204 {

205 cam.input_move(0, dir * 0.1, 0);

206 }

207

208 void game_6dof_move(float x, float y, float z)

209 {

210 cam.input_move(x, y, z);

211 }

212

213 void game_6dof_rotate(float x, float y, float z)

214 {

215 cam.input_rotate(x, y, z);

216 }

217

218 static void draw_scene()

219 {

220 glMatrixMode(GL_MODELVIEW);

221 glTranslatef(0, -1.5, 0);

222

223 float lpos[] = {-20, 30, 10, 1};

224 glLightfv(GL_LIGHT0, GL_POSITION, lpos);

225

226 glEnable(GL_TEXTURE_2D);

227 floor_tex.bind();

228

229 glMatrixMode(GL_TEXTURE);

230 glScalef(8, 8, 8);

231

232 glBegin(GL_QUADS);

233 glNormal3f(0, 1, 0);

234 glTexCoord2f(0, 0); glVertex3f(-25, 0, 25);

235 glTexCoord2f(1, 0); glVertex3f(25, 0, 25);

236 glTexCoord2f(1, 1); glVertex3f(25, 0, -25);

237 glTexCoord2f(0, 1); glVertex3f(-25, 0, -25);

238 glEnd();

239 glDisable(GL_TEXTURE_2D);

240 glLoadIdentity();

241

242 glMatrixMode(GL_MODELVIEW);

243 glPushMatrix();

244 glTranslatef(0, 0.75, 0);

245

246 glFrontFace(GL_CW);

247 glutSolidTeapot(1.0);

248 glFrontFace(GL_CCW);

249

250 glPopMatrix();

251 }

252

253 static bool setup_rtarg(int x, int y)

254 {

255 int tex_width = next_pow2(x);

256 int tex_height = next_pow2(y);

257

258 /* create render targets for each eye */

259 if(!fbo) {

260 glGenFramebuffers(1, &fbo);

261 glGenRenderbuffers(1, &rtarg_depth);

262 rtarg = new Texture;

263 }

264

265 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

266

267 glBindRenderbuffer(GL_RENDERBUFFER, rtarg_depth);

268 glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, tex_width, tex_height);

269 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rtarg_depth);

270

271 rtarg->create2d(tex_width, tex_height);

272 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,

273 rtarg->get_texture_id(), 0);

274

275 if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {

276 fprintf(stderr, "incomplete framebuffer!\n");

277 return false;

278 }

279 glBindFramebuffer(GL_FRAMEBUFFER, 0);

280

281 printf("created render target %dx%d (texture: %dx%d)\n", x, y, tex_width, tex_height);

282 return true;

283 }