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nuclear@27
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1 #include <stdio.h>
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nuclear@27
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2 #include <stdlib.h>
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nuclear@27
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3 #include <math.h>
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nuclear@27
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4 #include <signal.h>
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nuclear@27
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5 #include <conio.h>
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nuclear@27
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6 #include "wvga.h"
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nuclear@27
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7 #include "mingl.h"
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8 #include "timer.h"
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9 #include "mouse.h"
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10 #include "texture.h"
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11 #include "palman.h"
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12 #include "scene.h"
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13
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14 #define DEG2RAD(x) (M_PI * (x) / 180.0)
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15
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16 static int init(void);
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17 static void shutdown(void);
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18 static void redraw(void);
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19 static int proc_events(void);
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20 static int keyb(int key);
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21 static void mouse_button(int bn, int x, int y);
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22 static void mouse_motion(int x, int y);
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23 static void sighandler(int s);
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24
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25
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26 static float cam_x, cam_y, cam_z;
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27 static float cam_theta, cam_phi;
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28
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29 static float walk_speed = 0.5;
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30 static float look_speed = 1.0;
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31 static int mouse_look = 0;
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32
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33 static void *fbuf;
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34 static struct scene scn;
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35
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36
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37 int main(void)
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38 {
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39 if(init() == -1) {
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40 return 1;
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41 }
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42
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43 while(proc_events()) {
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44 redraw();
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45 }
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46
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47 shutdown();
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48 return 0;
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49 }
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50
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51
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52 static int init(void)
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53 {
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54 float vfov, hfov, aspect;
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55
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56 aspect = 320.0 / 200.0;
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57 vfov = 60.0;
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58 hfov = vfov * aspect;
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59
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60 init_timer(100);
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61
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62 set_video_mode(0x13);
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63
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64 signal(SIGINT, sighandler);
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65 signal(SIGSEGV, sighandler);
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66 signal(SIGFPE, sighandler);
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67 signal(SIGILL, sighandler);
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68 signal(SIGABRT, sighandler);
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69
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70 if(mgl_init(320, 200) == -1) {
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71 fprintf(stderr, "mgl init failed\n");
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72 return -1;
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73 }
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74 fbuf = mgl_framebuffer();
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75
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76 mgl_enable(MGL_CULL_FACE);
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77 mgl_enable(MGL_SMOOTH);
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78 mgl_enable(MGL_LIGHTING);
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79 mgl_enable(MGL_DEPTH_TEST);
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80
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81 mgl_matrix_mode(MGL_PROJECTION);
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82 mgl_load_identity();
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83 mgl_perspective(vfov, aspect, 0.5, 200.0);
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84
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85 #if 0
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86 mgl_enable(MGL_CLIP_PLANE0);
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87 mgl_enable(MGL_CLIP_PLANE1);
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88 mgl_enable(MGL_CLIP_PLANE2);
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89 mgl_enable(MGL_CLIP_PLANE3);
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90 mgl_clip_plane(MGL_CLIP_PLANE0, -1, 0, -1, 0); /* positive X */
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91 mgl_clip_plane(MGL_CLIP_PLANE1, 1, 0, -1, 0); /* negative X */
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92 mgl_clip_plane(MGL_CLIP_PLANE2, 0, -1, -0.5, 0); /* positive Y */
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93 mgl_clip_plane(MGL_CLIP_PLANE3, 0, 1, -0.5, 0); /* negative Y */
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94 #endif
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95
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96 /* setup palette */
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97 palm_add_color(255, 255, 255);
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98
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99 scn_init(&scn);
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100 if(scn_load(&scn, "data/hall.obj") == -1) {
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101 return -1;
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102 }
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103
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104 palm_build();
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105 {
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106 int i, palsz = palm_palette_size();
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107 struct palm_color *pal = palm_palette();
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108
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109 for(i=0; i<palsz; i++) {
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110 set_pal_entry(i, pal[i].r, pal[i].g, pal[i].b);
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111 }
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112 }
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113
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114 mgl_color_range(palm_color_range() - 1);
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115 return 0;
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116 }
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117
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118 static void shutdown(void)
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119 {
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120 mgl_free();
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121 set_video_mode(3);
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122 }
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123
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124 static void redraw(void)
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125 {
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126 mgl_clear(0);
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127 mgl_clear_depth();
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128
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129 mgl_matrix_mode(MGL_MODELVIEW);
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130 mgl_load_identity();
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131 mgl_rotate(cam_phi, 1, 0, 0);
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132 mgl_rotate(cam_theta, 0, 1, 0);
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133 mgl_translate(-cam_x, -cam_y, -cam_z);
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134 mgl_translate(0, -2.0, 0);
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135
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136 mgl_light_intensity(0, 1.0);
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137 mgl_light_position(0, 0, 5, 0, 1);
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138
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139 /*mgl_torus(0.75, 0.25, 16, 8);*/
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140 scn_render(&scn);
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141
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142 copy_frame(fbuf);
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143 }
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144
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145 #define DEG_TO_RAD(x) (M_PI * (x) / 180.0)
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146 void cam_move(float dx, float dy)
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147 {
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148 float angle = DEG_TO_RAD(cam_theta);
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149 cam_x += cos(angle) * dx + sin(angle) * dy;
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150 cam_z -= -sin(angle) * dx + cos(angle) * dy;
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151 }
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152
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153 static int proc_events(void)
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154 {
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155 static int prev_mx, prev_my, prev_bnmask;
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156 int mx, my, bnmask;
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157
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158 if(kbhit()) {
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159 if(keyb(getch()) == 0) {
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160 return 0;
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161 }
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162 }
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163
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164 bnmask = read_mouse(&mx, &my);
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165 if(bnmask != prev_bnmask) {
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166 mouse_button(bnmask, mx, my);
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167 prev_bnmask = bnmask;
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168 }
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169 if(mx != prev_mx || my != prev_my) {
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170 mouse_motion(mx, my);
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171 prev_mx = mx;
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172 prev_my = my;
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173 }
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174 return 1;
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175 }
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176
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177 static int keyb(int key)
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178 {
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179 switch(key) {
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180 case 27:
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181 return 0;
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182
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183 case 'w':
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184 cam_move(0, walk_speed);
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185 break;
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186
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187 case 's':
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188 cam_move(0, -walk_speed);
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189 break;
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190
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191 case 'a':
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192 cam_move(-walk_speed, 0);
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193 break;
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194
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195 case 'd':
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196 cam_move(walk_speed, 0);
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197 break;
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198
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199 case '`':
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200 mouse_look = !mouse_look;
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201 break;
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202
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203 default:
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204 break;
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205 }
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206 return 1;
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207 }
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208
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209 static int bnstate;
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210 static void mouse_button(int bn, int x, int y)
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211 {
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212 bnstate = bn;
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213 }
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214
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215 static void mouse_motion(int x, int y)
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216 {
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217 static int prev_x, prev_y;
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218 int dx = x - prev_x;
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219 int dy = y - prev_y;
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220 prev_x = x;
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221 prev_y = y;
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222
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223 if(mouse_look || bnstate) {
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224 cam_theta += dx * look_speed;
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225 cam_phi += dy * look_speed;
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226
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227 if(cam_phi < -90) {
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228 cam_phi = -90;
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229 }
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230 if(cam_phi > 90) {
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231 cam_phi = 90;
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232 }
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233 }
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234 }
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235
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236 static void sighandler(int s)
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237 {
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238 set_video_mode(3);
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239
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240 switch(s) {
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241 case SIGABRT:
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242 fprintf(stderr, "abort\n");
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243 break;
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244
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245 case SIGILL:
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246 fprintf(stderr, "illegal operation\n");
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247 break;
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248
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249 case SIGSEGV:
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250 fprintf(stderr, "segmentation fault\n");
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251 break;
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252
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253 case SIGINT:
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254 fprintf(stderr, "interrupted\n");
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255 break;
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256
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257 case SIGFPE:
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258 fprintf(stderr, "floating point exception\n");
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259 break;
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260
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261 default:
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262 fprintf(stderr, "unexpected signal\n");
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263 }
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264
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265 exit(1);
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266 }
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