added shading, reduced debug-output

shaders/mapobjects/fragment.shader

@@ -5,6 +5,17 @@ in vec3 vNormal;
 
 out vec4 fgColor;
 
+uniform mat4 ViewMatrix;
+
 void main () {
-    fgColor = vec4(1.0,0.0,1.0,0.5);
+    //heliospheric lighting
+    vec4 light = vec4(1.0,1.0,1.0,1.0);
+    vec4 dark  = vec4(0.0,0.0,0.0,1.0);
+    //direction to sun from origin
+    vec3 lightDir = normalize(ViewMatrix * vec4(5.0,5.0,1.0,0.0)).xyz;
+
+    float costheta = dot(vNormal, lightDir);
+    float a = costheta * 0.5 + 0.5;
+
+    fgColor = vec4(0.5,0.5,0.5,1)*mix(dark,light,a);
 }

shaders/mapobjects/vertex.shader

@@ -6,7 +6,7 @@ layout(location=2) in vec2 TexCoord;
 uniform mat4 ProjectionMatrix;
 uniform mat4 ViewMatrix;
 uniform mat3 NormalMatrix;
-uniform vec3 PositionOffset = vec3(5,5,5);
+uniform vec3 PositionOffset = vec3(5,2,5);
 uniform float TessLevelInner = 1.0; // controlled by keyboard buttons
 uniform float TessLevelOuter = 1.0; // controlled by keyboard buttons
 
@@ -15,6 +15,7 @@ out vec3 vNormal;
 
 void main () {
    vPosition = Position;
-   gl_Position = vec4(Position,1);//ProjectionMatrix * ViewMatrix * vec4(PositionOffset + Position, 1);
+   //gl_Position = vec4(Position,1);
+   gl_Position = ProjectionMatrix * ViewMatrix * vec4(PositionOffset + Position, 1);
    vNormal = Normal;
 }