conworlds: bd8202d6d28d src/game.cc

conworlds

view src/game.cc @ 7:bd8202d6d28d

some progress...

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 22 Aug 2014 16:55:16 +0300
parents	3c36bc28c6c2
children	90abf4b93cc9

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();

25 vr_use_module_named("null");

27 glEnable(GL_DEPTH_TEST);

28 glEnable(GL_CULL_FACE);

29 glEnable(GL_LIGHTING);

30 glEnable(GL_LIGHT0);

32 glClearColor(0.1, 0.1, 0.1, 1);

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

36 return false;

37 }

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

40 return true;

41 }

43 void game_cleanup()

44 {

45 floor_tex.destroy();

46 vr_shutdown();

48 if(fbo) {

49 glDeleteFramebuffers(1, &fbo);

50 glDeleteRenderbuffers(1, &rtarg_depth);

51 delete rtarg;

52 }

53 }

55 void game_update(unsigned int msec)

56 {

57 static unsigned int prev_msec;

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

59 float offs = dt * move_speed;

60 prev_msec = msec;

62 Vector3 move;

63 float roll = 0.0f;

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

66 move.x += offs;

67 }

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

69 move.x -= offs;

70 }

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

72 move.z += offs;

73 }

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

75 move.z -= offs;

76 }

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

78 roll += dt;

79 }

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

81 roll -= dt;

82 }

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

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

86 }

88 void game_render()

89 {

90 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

91 glClearColor(1, 0, 0, 1);

92 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

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

95 vr_begin(VR_EYE_LEFT);

96 game_render_eye(-1);

97 vr_end();

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

100 vr_begin(VR_EYE_RIGHT);

101 game_render_eye(1);

102 vr_end();

103

104 glBindFramebuffer(GL_FRAMEBUFFER, 0);

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

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

107 }

108

109 static void game_render_eye(int eye)

110 {

111 float mat[16];

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

113

114 glMatrixMode(GL_PROJECTION);

115 glLoadIdentity();

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

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

118 /*} else {

119 glLoadMatrixf(mat);

120 }*/

121

122 glMatrixMode(GL_MODELVIEW);

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

124 glLoadIdentity();

125 } else {

126 glLoadTransposeMatrixf(mat);

127 }

128 glMultTransposeMatrixf(view_matrix[0]);

129

130 draw_scene();

131 }

132

133 void game_reshape(int x, int y)

134 {

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

136 fb_width = x;

137 fb_height = y;

138

139 int lxres = vr_get_opti(VR_OPT_LEYE_XRES);

140 if(lxres) {

141 int lyres = vr_get_opti(VR_OPT_LEYE_YRES);

142 int rxres = vr_get_opti(VR_OPT_REYE_XRES);

143 int ryres = vr_get_opti(VR_OPT_REYE_YRES);

144

145 rtwidth = lxres + rxres;

146 rtheight = lyres > ryres ? lyres : ryres;

147 } else {

148 rtwidth = x;

149 rtheight = y;

150 }

151

152 setup_rtarg(rtwidth, rtheight);

153 }

154

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

156 {

157 if(pressed) {

158 switch(key) {

159 case 27:

160 exit(0);

161 }

162 }

163

164 if(key < 256) {

165 keystate[key] = pressed;

166 }

167 }

168

169 static int prev_x, prev_y;

170 static bool bnstate[32];

171

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

173 {

174 bnstate[bn] = pressed;

175 prev_x = x;

176 prev_y = y;

177 }

178

179 void game_motion(int x, int y)

180 {

181 int dx = x - prev_x;

182 int dy = y - prev_y;

183 prev_x = x;

184 prev_y = y;

185

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

187

188 if(bnstate[0]) {

189 float xrot = dy * 0.5;

190 float yrot = dx * 0.5;

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

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

193 }

194 }

195

196 void game_mwheel(int dir)

197 {

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

199 }

200

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

202 {

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

204 }

205

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

207 {

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

209 }

210

211 static void draw_scene()

212 {

213 glMatrixMode(GL_MODELVIEW);

214 glTranslatef(0, -1.5, 0);

215

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

217 glLightfv(GL_LIGHT0, GL_POSITION, lpos);

218

219 glEnable(GL_TEXTURE_2D);

220 floor_tex.bind();

221

222 glMatrixMode(GL_TEXTURE);

223 glScalef(8, 8, 8);

224

225 glBegin(GL_QUADS);

226 glNormal3f(0, 1, 0);

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

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

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

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

231 glEnd();

232 glDisable(GL_TEXTURE_2D);

233 glLoadIdentity();

234

235 glMatrixMode(GL_MODELVIEW);

236 glPushMatrix();

237 glTranslatef(0, 0.75, 0);

238

239 glFrontFace(GL_CW);

240 glutSolidTeapot(1.0);

241 glFrontFace(GL_CCW);

242

243 glPopMatrix();

244 }

245

246 static bool setup_rtarg(int x, int y)

247 {

248 int tex_width = next_pow2(x);

249 int tex_height = next_pow2(y);

250

251 /* create render targets for each eye */

252 if(!fbo) {

253 glGenFramebuffers(1, &fbo);

254 glGenRenderbuffers(1, &rtarg_depth);

255 rtarg = new Texture;

256 }

257

258 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

259

260 glBindRenderbuffer(GL_RENDERBUFFER, rtarg_depth);

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

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

263

264 rtarg->create2d(tex_width, tex_height);

265 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,

266 rtarg->get_texture_id(), 0);

267

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

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

270 return false;

271 }

272 glBindFramebuffer(GL_FRAMEBUFFER, 0);

273

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

275 return true;

276 }