WIP

shaders/wave.frag

@@ -6,6 +6,8 @@ precision mediump float;
 
 in vec4 pos;
 in vec3 v_surfaceToLight;
+in vec3 baseColor;
+in vec3 maxColor;
 uniform vec4 u_color;
 
 out vec4 outColor;
@@ -14,8 +16,6 @@ void main() {
     vec4 fragNormal = normalize(pos);
     float u_light = 0.3;
     float light = max(dot(fragNormal.xyz, normalize(v_surfaceToLight).xyz), u_light);
-    vec3 baseColor = vec3(0, 0, 1);
-    vec3 maxColor = vec3(1, 0, 0);
     float y = pos.z;
     if (y < 0.0) {
         y = y * -1.0;

shaders/wave.vert

@@ -3,12 +3,18 @@
 in vec3 a_position;
 uniform mat4 u_matrix;
 uniform vec3 u_lightPos;
+uniform vec3 u_baseColor;
+uniform vec3 u_maxColor;
 
 out vec4 pos;
 out vec3 v_surfaceToLight;
+out vec3 maxColor;
+out vec3 baseColor;
 
 void main() {
     pos = u_matrix * vec4(a_position, 1);
     gl_Position = pos;
     v_surfaceToLight = u_lightPos - pos.xyz;
+    maxColor = u_maxColor;
+    baseColor = u_baseColor;
 }

shaders/wave2d.frag

@@ -0,0 +1,19 @@
+#version 300 es
+
+// fragment shaders don't have a default precision so we need
+// to pick one. mediump is a good default. It means "medium precision"
+precision mediump float;
+
+in vec4 pos;
+in vec3 baseColor;
+in vec3 maxColor;
+out vec4 outColor;
+
+void main() {
+    float y = pos.z;
+    if (y < 0.0) {
+        y = y * -1.0;
+    }
+    vec3 color = mix(baseColor, maxColor, y);
+    outColor = vec4(color, 1.0);
+}

shaders/wave2d.vert

@@ -0,0 +1,19 @@
+#version 300 es
+
+in vec3 a_position;
+uniform mat4 u_matrix;
+uniform vec3 u_baseColor;
+uniform vec3 u_maxColor;
+
+out vec4 pos;
+out vec3 maxColor;
+out vec3 baseColor;
+
+void main() {
+    pos = u_matrix * vec4(a_position, 1);
+    pos.y = pos.y * 0.6;
+    gl_Position = pos;
+
+    maxColor = u_maxColor;
+    baseColor = u_baseColor;
+}