3dphotoshoot

annotate src/game.c @ 10:c71c477521ca

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converting to GLES2 and C++
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 31 May 2015 00:40:26 +0300
parents d1b456d08713
children ad49e1f9b627
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <math.h>
nuclear@0 4 #include "opengl.h"
nuclear@0 5 #include "game.h"
nuclear@7 6 #include "camera.h"
nuclear@10 7 #include "sdr.h"
nuclear@7 8
nuclear@8 9 static void draw_quad(float hsz, float vsz);
nuclear@0 10
nuclear@0 11 static int win_width, win_height;
nuclear@9 12 static float win_aspect;
nuclear@9 13 static int video_width, video_height;
nuclear@9 14 static float video_aspect;
nuclear@10 15 static unsigned int sdrprog;
nuclear@10 16 static int aloc_vertex, aloc_texcoord, uloc_texmat, uloc_wmat, uloc_vmat, uloc_pmat;
nuclear@10 17
nuclear@10 18 static const char *vsdr_source =
nuclear@10 19 "attribute vec4 attr_pos, attr_tex;\n"
nuclear@10 20 "uniform mat4 world_matrix, proj_matrix, tex_matrix;\n"
nuclear@10 21 "varying vec4 tex_coords;\n"
nuclear@10 22 "void main()\n"
nuclear@10 23 "{\n"
nuclear@10 24 "\tmat4 mvp = proj_matrix * world_matrix;\n"
nuclear@10 25 "\tgl_Position = mvp * attr_pos;\n"
nuclear@10 26 "\ttex_coords = tex_matrix * attr_tex;\n"
nuclear@10 27 "}\n";
nuclear@10 28
nuclear@10 29 static const char *psdr_source =
nuclear@10 30 "#extension GL_OES_EGL_image_external : require\n"
nuclear@10 31 "precision lowp float;\n"
nuclear@10 32 "uniform samplerExternalOES tex;\n"
nuclear@10 33 "varying vec4 tex_coords;\n"
nuclear@10 34 "void main()\n"
nuclear@10 35 "{\n"
nuclear@10 36 "\tvec4 texel = texture2D(tex, tex_coords.xy);\n"
nuclear@10 37 "\tgl_FragColor = vec4(texel.xyz, 1.0);\n"
nuclear@10 38 "}\n";
nuclear@0 39
nuclear@0 40
nuclear@0 41 int game_init(void)
nuclear@0 42 {
nuclear@10 43 unsigned int vsdr, psdr;
nuclear@10 44
nuclear@0 45 glEnable(GL_DEPTH_TEST);
nuclear@0 46 glEnable(GL_CULL_FACE);
nuclear@0 47
nuclear@0 48 glClearColor(0.4, 0.4, 0.4, 1);
nuclear@8 49
nuclear@10 50 if(!(vsdr = create_vertex_shader(vsdr_source)))
nuclear@10 51 return -1;
nuclear@10 52 if(!(psdr = create_pixel_shader(psdr_source)))
nuclear@10 53 return -1;
nuclear@10 54 if(!(sdrprog = create_program_link(vsdr, psdr))) {
nuclear@10 55 fprintf(stderr, "failed to create shader program\n");
nuclear@10 56 return -1;
nuclear@10 57 }
nuclear@10 58 glUseProgram(sdrprog);
nuclear@10 59 aloc_vertex = glGetAttribLocation(sdrprog, "attr_pos");
nuclear@10 60 aloc_texcoord = glGetAttribLocation(sdrprog, "attr_tex");
nuclear@10 61 uloc_texmat = glGetUniformLocation(sdrprog, "tex_matrix");
nuclear@10 62 uloc_wmat = glGetUniformLocation(sdrprog, "world_matrix");
nuclear@10 63 uloc_vmat = glGetUniformLocation(sdrprog, "view_matrix");
nuclear@10 64 uloc_pmat = glGetUniformLocation(sdrprog, "proj_matrix");
nuclear@10 65
nuclear@8 66 cam_start_video();
nuclear@9 67 cam_video_size(&video_width, &video_height);
nuclear@9 68 if(video_height) {
nuclear@9 69 video_aspect = (float)video_width / (float)video_height;
nuclear@9 70 } else {
nuclear@9 71 video_aspect = 1.0;
nuclear@9 72 }
nuclear@9 73
nuclear@9 74 printf("started video %dx%d (aspect: %g)\n", video_width, video_height, video_aspect);
nuclear@0 75 return 0;
nuclear@0 76 }
nuclear@0 77
nuclear@0 78 void game_shutdown(void)
nuclear@0 79 {
nuclear@8 80 cam_shutdown();
nuclear@10 81 free_program(sdrprog);
nuclear@0 82 }
nuclear@0 83
nuclear@0 84 void game_display(unsigned long msec)
nuclear@0 85 {
nuclear@9 86 unsigned int tex;
nuclear@9 87 const float *tex_matrix;
nuclear@9 88 float xscale, yscale;
nuclear@9 89
nuclear@8 90 cam_update();
nuclear@9 91 tex = cam_texture();
nuclear@9 92 tex_matrix = cam_texture_matrix();
nuclear@7 93
nuclear@4 94 //float tsec = (float)msec / 1000.0f;
nuclear@0 95
nuclear@4 96 //glClearColor(sin(tsec * 10.0), cos(tsec * 10.0), -sin(tsec * 10.0), 1.0);
nuclear@0 97 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 98
nuclear@10 99 glUseProgram(sdrprog);
nuclear@10 100 glUniformMatrix4fv(uloc_texmat, 1, 0, tex_matrix);
nuclear@10 101 glBindTexture(GL_TEXTURE_EXTERNAL_OES, tex);
nuclear@7 102
nuclear@9 103 if(video_aspect > win_aspect) {
nuclear@9 104 xscale = 1.0;
nuclear@9 105 yscale = 1.0 / video_aspect;
nuclear@9 106 } else {
nuclear@9 107 xscale = video_aspect;
nuclear@9 108 yscale = 1.0;
nuclear@9 109 }
nuclear@9 110 draw_quad(xscale, yscale);
nuclear@7 111 }
nuclear@7 112
nuclear@8 113 static void draw_quad(float hsz, float vsz)
nuclear@7 114 {
nuclear@7 115 static const float varr[] = {-1, -1, 1, -1, 1, 1, -1, 1};
nuclear@9 116 static const float tcarr[] = {0, 0, 1, 0, 1, 1, 0, 1};
nuclear@10 117 float xform[16] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};
nuclear@7 118
nuclear@10 119 if(aloc_vertex == -1) {
nuclear@10 120 return;
nuclear@10 121 }
nuclear@7 122
nuclear@10 123 xform[0] = hsz;
nuclear@10 124 xform[5] = vsz;
nuclear@10 125 glUniformMatrix4fv(uloc_wmat, 1, 0, xform);
nuclear@7 126
nuclear@10 127 glEnableVertexAttribArray(aloc_vertex);
nuclear@10 128 glVertexAttribPointer(aloc_vertex, 2, GL_FLOAT, 0, 0, varr);
nuclear@10 129 if(aloc_texcoord) {
nuclear@10 130 glEnableVertexAttribArray(aloc_texcoord);
nuclear@10 131 glVertexAttribPointer(aloc_texcoord, 2, GL_FLOAT, 0, 0, tcarr);
nuclear@10 132 }
nuclear@7 133
nuclear@8 134 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
nuclear@7 135
nuclear@10 136 glDisableVertexAttribArray(aloc_vertex);
nuclear@10 137 if(aloc_texcoord) {
nuclear@10 138 glDisableVertexAttribArray(aloc_texcoord);
nuclear@10 139 }
nuclear@0 140 }
nuclear@0 141
nuclear@0 142 void game_reshape(int x, int y)
nuclear@0 143 {
nuclear@0 144 win_width = x;
nuclear@0 145 win_height = y;
nuclear@9 146 win_aspect = y ? (float)x / (float)y : 1.0;
nuclear@0 147 glViewport(0, 0, x, y);
nuclear@0 148
nuclear@10 149 /*glMatrixMode(GL_PROJECTION);
nuclear@0 150 glLoadIdentity();
nuclear@10 151 glScalef((float)win_height / (float)win_width, 1.0, 1.0);*/
nuclear@0 152 }
nuclear@0 153
nuclear@0 154 void game_keyboard(int key, int pressed)
nuclear@0 155 {
nuclear@0 156 if(!pressed) return;
nuclear@0 157
nuclear@0 158 switch(key) {
nuclear@0 159 case 27:
nuclear@0 160 exit(0);
nuclear@0 161
nuclear@0 162 default:
nuclear@0 163 break;
nuclear@0 164 }
nuclear@0 165 }
nuclear@0 166
nuclear@0 167 #define MAX_TOUCH_IDS 16
nuclear@0 168 static struct {
nuclear@0 169 int bnstate[8];
nuclear@0 170 int prev_x, prev_y;
nuclear@0 171 } mstate[MAX_TOUCH_IDS];
nuclear@0 172
nuclear@0 173 void game_mouse_button(int id, int bn, int pressed, int x, int y)
nuclear@0 174 {
nuclear@0 175 if(id >= MAX_TOUCH_IDS) return;
nuclear@0 176
nuclear@0 177 mstate[id].prev_x = x;
nuclear@0 178 mstate[id].prev_y = y;
nuclear@0 179 mstate[id].bnstate[bn] = pressed;
nuclear@0 180 }
nuclear@0 181
nuclear@0 182 void game_mouse_motion(int id, int x, int y)
nuclear@0 183 {
nuclear@0 184 /*
nuclear@0 185 int dx, dy, cx, cy;
nuclear@0 186
nuclear@0 187 if(id >= MAX_TOUCH_IDS) return;
nuclear@0 188
nuclear@0 189 cx = win_width / 2;
nuclear@0 190 cy = win_height / 2;
nuclear@0 191
nuclear@0 192 dx = x - mstate[id].prev_x;
nuclear@0 193 dy = y - mstate[id].prev_y;
nuclear@0 194 mstate[id].prev_x = x;
nuclear@0 195 mstate[id].prev_y = y;
nuclear@0 196
nuclear@0 197 if(!dx && !dy) return;
nuclear@0 198
nuclear@0 199 if(mouselook || mstate[id].bnstate[0]) {
nuclear@0 200 player_turn(&player, dx * 0.5, dy * 0.5);
nuclear@0 201 }
nuclear@0 202 if(mstate[id].bnstate[2]) {
nuclear@0 203 dbg_cam_dist += 0.1 * dy;
nuclear@0 204 if(dbg_cam_dist < 0.0) dbg_cam_dist = 0.0;
nuclear@0 205 }
nuclear@0 206
nuclear@0 207 if(mouselook) {
nuclear@0 208 warping_mouse = 1;
nuclear@0 209 set_mouse_pos(cx, cy);
nuclear@0 210 mstate[id].prev_x = cx;
nuclear@0 211 mstate[id].prev_y = cy;
nuclear@0 212 }
nuclear@0 213 */
nuclear@0 214 }
nuclear@0 215