[SphereTracing:レンダリング]疑似マルãƒãƒ‘ス・グラス・レンダリング - Qiita// åå°„ã¨å±ˆæŠ˜ã‚’è¦å®šã•ã‚ŒãŸå›žæ•°åˆ†ç¹°ã‚Šè¿”ã—トレースã™ã‚‹ vec4 render(in Ray currentRay) { vec3 col = vec3(0); // 出力 Hit hits[STACK_MAX]; // ãƒ’ãƒƒãƒˆæƒ…å ±ã®ã‚¹ã‚¿ãƒƒã‚¯é ˜åŸŸ int stackIndex = 1; // æƒ…å ±ã‚’è¨˜éŒ²ã™ã‚‹ä½ç½®ã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ int curretIndex; // レンダリングã™ã‚‹ä½ç½®ã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ // ã¾ãšã€æ™®é€šã«ãƒ¬ã‚¤ãƒˆãƒ¬ãƒ¼ã‚¹ã—ã¦0番スタックã«çµæžœã‚’代入 hits[0] = trace(currentRay); // å„ã‚¹ã‚¿ãƒƒã‚¯ã‚’é †æ¬¡è¨ˆç®—ã—ã¦ã„ã for (curretIndex = 0; curretIndex < STACK_MAX; curretIndex++) { // æƒ…å ±ã‚’è¨˜éŒ²ã™ã‚‹ä½ç½®ã‚’超ãˆãŸã‚‰ã€ãƒ¬ãƒ³ãƒ€ãƒªãƒ³ã‚°çµ‚了 // (GLSLã§ã¯ãƒ«ãƒ¼ãƒ—æ¡ä»¶ã«å¤‰æ•°ã‚’使ãˆãªã„ãŸã‚ã€ãƒ«ãƒ¼ãƒ—回
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