update

shader/skirt.frag

@@ -0,0 +1,37 @@
+#version 330 core
+
+in vec3 vNormal;
+in vec3 vWorldPos;
+in vec3 vUV;
+out vec4 FragColor;
+
+uniform vec3 uCameraPos;
+uniform vec3 uLightDir;
+uniform sampler2D uHeightTex;
+uniform float uMinV;
+uniform float uMaxV;
+uniform vec2 uTexelSize;
+uniform vec3 uColorZero;
+uniform vec3 uColorLow;
+uniform vec3 uColorMid;
+uniform vec3 uColorHeigh;
+
+float saturate(float x) {
+    return clamp(x, 0.0, 1.0);
+}
+
+float value01(float v) {
+    return saturate((v - uMinV) / max(uMaxV - uMinV, 1e-6));
+}
+
+vec3 colorRamp(float t) {
+    if (t < 0.5) {
+        return mix(uColorLow, uColorMid, t / 0.5);
+    }
+
+    return mix(uColorHeigh, uColorMid, (t - 0.5) / 0.5);
+}
+
+float maxNeighborValue(vec2 uv) {
+    
+}