first commit

shaders/sphere.frag

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+#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 highp float;
+
+in vec3 v_surfaceToLight;
+
+uniform vec4 u_color;
+uniform vec3 u_lightPos;
+
+out vec4 outColor;
+
+void main() {
+    vec3 surfaceToLightDirection = normalize(v_surfaceToLight);
+    outColor = u_color;
+    float light = 1.0;
+    //outColor.rgb *= surfaceToLightDirection;
+}

shaders/sphere.vert

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+#version 300 es
+
+in vec4 a_position;
+uniform mat4 u_world;
+uniform mat4 u_matrix;
+uniform vec3 u_lightPos;
+uniform vec3 u_light;
+uniform float u_pointSize;
+
+out vec3 v_surfaceToLight;
+
+void main() {
+    // convert the position from pixels to 0.0 to 1.0
+    vec4 pos = a_position * u_matrix;
+    gl_Position = pos;
+    gl_PointSize = u_pointSize;
+
+    vec3 surfaceWorldPosition = (u_world * pos).xyz;
+
+    v_surfaceToLight = u_lightPos - surfaceWorldPosition;
+}

shaders/test.frag

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+#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;
+
+uniform vec4 u_color;
+
+out vec4 outColor;
+
+void main() {
+  outColor = u_color;
+}

shaders/test.vert

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+#version 300 es
+
+in vec2 a_position;
+void main() {
+    // convert the position from pixels to 0.0 to 1.0
+    vec2 scale = a_position / vec2(255.0, 255.0);
+    vec2 remap = scale * 2.0;
+    vec2 space = remap - 1.0;
+    space.y = space.y * 0.85;
+    gl_Position = vec4(space, 0,1);
+}