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c语言三维球动画程序
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这是用VC6写的一个小动画程序,显示一个不断旋转的三维球体和它的包围盒,
同时可以用WSAD四个键调整视角
以下是源代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 | #include "graphics.h" #include <stdio.h> #include <math.h> #define PI 3.1415926535897932384626 const int sc_width = 640; const int sc_height = 640; typedef void * HANDLE; typedef struct STAR { float x; float y; float z; float r; float R; float rad; int color; } *PSTAR; typedef struct SCENE { float dx; float dz; float drz; float fs; int key[4]; PSTAR star; int nMaxStar; } *PSCENE; double frandom() { return (double)random(10000) / 10000; } void InitStar(PSTAR star) { star->y = (float)(frandom() * 2 - 1.0); star->R = (float)sqrt(1 - star->y * star->y); star->r = (float)(frandom() * PI * 2); star->rad = (float)(frandom() * 0.01 + 0.01); star->color = 0xFFFFFF; } void MoveStar(PSTAR star, double dt) { star->r += star->rad * (float)dt; if (star->r > 2*PI) { star->r -= (float)(2*PI); } star->x = (float)(star->R * cos(star->r)); star->z = (float)(star->R * sin(star->r)); } int alpha(int color, float a) { int r = color&0xff, g = (color>>8)&0xff, b = (color>>16)&0xff; r = (int)(r*a); g = (int)(g*a); b = (int)(b*a); return rgb(r, g, b); } void DrawStar(PSTAR star, float dz, float drz) { float bz = 0.5f; int color = star->color; { struct point3d t = {star->x, star->y, star->z}; rotate_point3d_z(&t, drz); { float z = star->z + dz; if (z < 1.0f + bz) { } else if (z > 0) { color = alpha(color, 1.0f / (z - bz)); } draw_point(&t, color); } } } int __stdcall on_msg_key(HANDLE param, unsigned msg, int key) { PSCENE scene = (PSCENE) param; if (msg == MSG_EVENT_DOWN) { if (key == 'W') { scene->key[0] = 1; } else if (key == 'S') { scene->key[1] = 1; } else if (key == 'A') { scene->key[2] = 1; } else if (key == 'D') { scene->key[3] = 1; } } else if (msg == MSG_EVENT_UP) { if (key == 'W') { scene->key[0] = 0; } else if (key == 'S') { scene->key[1] = 0; } else if (key == 'A') { scene->key[2] = 0; } else if (key == 'D') { scene->key[3] = 0; } } return 0; } int __stdcall on_update(HANDLE param, float ms) { PSCENE scene = (PSCENE)param; scene->fs += 0.001f; if (scene->fs >= 1.0f) { scene->fs -= 1.0f; } scene->drz += 0.01f; if (scene->drz > 2*PI) { scene->drz -= (float)(2*PI); } if (scene->key[0]) { scene->dz -= 0.01f; } if (scene->key[1]) { scene->dz += 0.01f; } if (scene->key[2]) { scene->dx -= 0.01f; } if (scene->key[3]) { scene->dx += 0.01f; } return 0; } int __stdcall on_render(HANDLE param, float ms) { double dt = ms * 0.06; PSCENE scene = (PSCENE) param; int i; cleardevice(); { struct point3d t = {scene->dx, 0, -scene->dz}; set_viewpoint(&t); } for (i = 0; i < scene->nMaxStar; i++) { MoveStar(scene->star + i, dt); DrawStar(scene->star + i, scene->dz, scene->drz); } { struct point3d pcenter[2] = { {0, 1, 0}, {0,-1, 0} }; struct point3d pbox[8] = { { 1, 1, 1}, { 1, 1,-1}, { 1,-1, 1}, { 1,-1,-1}, {-1, 1, 1}, {-1, 1,-1}, {-1,-1, 1}, {-1,-1,-1}, }; rotate_point3d_z(&pcenter[0], scene->drz); rotate_point3d_z(&pcenter[1], scene->drz); setcolor(0xFF202020); draw_line(&pbox[0], &pbox[1]); draw_line(&pbox[2], &pbox[3]); draw_line(&pbox[4], &pbox[5]); draw_line(&pbox[6], &pbox[7]); draw_line(&pbox[0], &pbox[3]); draw_line(&pbox[1], &pbox[2]); draw_line(&pbox[4], &pbox[7]); draw_line(&pbox[5], &pbox[6]); draw_line(&pbox[0], &pbox[5]); draw_line(&pbox[1], &pbox[4]); draw_line(&pbox[2], &pbox[7]); draw_line(&pbox[3], &pbox[6]); draw_line(&pcenter[0], &pcenter[1]); setcolor(0x202020); draw_line_f(&pbox[0], &pbox[2]); draw_line_f(&pbox[1], &pbox[3]); draw_line_f(&pbox[4], &pbox[6]); draw_line_f(&pbox[5], &pbox[7]); draw_line_f(&pbox[0], &pbox[4]); draw_line_f(&pbox[1], &pbox[5]); draw_line_f(&pbox[2], &pbox[6]); draw_line_f(&pbox[3], &pbox[7]); } setcolor(HSVtoRGB(scene->fs, 1.0f, 1.0f)); outtextxy(0, 0, (char*)"Press W, S, A or D to move the camera"); return 0; } int main() { #define MAXSTAR 500 struct STAR star[MAXSTAR]; struct SCENE scene = {0}; int i; { int g = TRUECOLORSIZE, m = SIZE2DWORD(sc_width, sc_height); initgraph(&g, &m, "3d Ball"); } scene.star = star; scene.drz = 0; scene.dx = 0; scene.dz = 3; scene.fs = 0; scene.nMaxStar = MAXSTAR; set_3dview((float)(sc_width / 2), (float)(sc_height / 2), (float)(sc_width), (float)(sc_height)); for (i = 0; i < scene.nMaxStar; i++) { InitStar(star + i); } message_addkeyhandler(&scene, on_msg_key); ege_gameloop(on_update, &scene, 60, on_render, &scene, 0); closegraph(); #undef MAXSTAR return 0; } |
c语言三维球动画程序