Initial project import

node_modules/three-stdlib/shaders/GodRaysShader.d.ts

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+import { Color, Vector3 } from 'three';
+/**
+ * God-rays (crepuscular rays)
+ *
+ * Similar implementation to the one used by Crytek for CryEngine 2 [Sousa2008].
+ * Blurs a mask generated from the depth map along radial lines emanating from the light
+ * source. The blur repeatedly applies a blur filter of increasing support but constant
+ * sample count to produce a blur filter with large support.
+ *
+ * My implementation performs 3 passes, similar to the implementation from Sousa. I found
+ * just 6 samples per pass produced acceptible results. The blur is applied three times,
+ * with decreasing filter support. The result is equivalent to a single pass with
+ * 6*6*6 = 216 samples.
+ *
+ * References:
+ *
+ * Sousa2008 - Crysis Next Gen Effects, GDC2008, http://www.crytek.com/sites/default/files/GDC08_SousaT_CrysisEffects.ppt
+ */
+export declare const GodRaysDepthMaskShader: {
+    uniforms: {
+        tInput: {
+            value: null;
+        };
+    };
+    vertexShader: string;
+    fragmentShader: string;
+};
+/**
+ * The god-ray generation shader.
+ *
+ * First pass:
+ *
+ * The depth map is blurred along radial lines towards the "sun". The
+ * output is written to a temporary render target (I used a 1/4 sized
+ * target).
+ *
+ * Pass two & three:
+ *
+ * The results of the previous pass are re-blurred, each time with a
+ * decreased distance between samples.
+ */
+export declare const GodRaysGenerateShader: {
+    uniforms: {
+        tInput: {
+            value: null;
+        };
+        fStepSize: {
+            value: number;
+        };
+        vSunPositionScreenSpace: {
+            value: Vector3;
+        };
+    };
+    vertexShader: string;
+    fragmentShader: string;
+};
+/**
+ * Additively applies god rays from texture tGodRays to a background (tColors).
+ * fGodRayIntensity attenuates the god rays.
+ */
+export declare const GodRaysCombineShader: {
+    uniforms: {
+        tColors: {
+            value: null;
+        };
+        tGodRays: {
+            value: null;
+        };
+        fGodRayIntensity: {
+            value: number;
+        };
+    };
+    vertexShader: string;
+    fragmentShader: string;
+};
+/**
+ * A dodgy sun/sky shader. Makes a bright spot at the sun location. Would be
+ * cheaper/faster/simpler to implement this as a simple sun sprite.
+ */
+export declare const GodRaysFakeSunShader: {
+    uniforms: {
+        vSunPositionScreenSpace: {
+            value: Vector3;
+        };
+        fAspect: {
+            value: number;
+        };
+        sunColor: {
+            value: Color;
+        };
+        bgColor: {
+            value: Color;
+        };
+    };
+    vertexShader: string;
+    fragmentShader: string;
+};