Add shading for shapes and the floor

shader/shape/basic.frag

@@ -1,10 +1,14 @@
 #version 450 core
 in vec4 vCol;
 in vec4 vPos;
+in vec4 vNorm;
 layout (location=0) out vec4 fCol;
 layout (location=1) out vec4 fPos;
+layout (location=2) out vec4 fNorm;
 void main()
 {
   fCol = vCol;
-  fPos = vec4(vPos.xyz,1);
+  fPos = vPos;
+  fNorm = vNorm;
+  //fNorm = vec4(vPos.x,vPos.y+2,vPos.z,1);
 }

shader/shape/basic.vert

@@ -1,11 +1,14 @@
 #version 450 core
 layout (location = 0) in vec4 pos;
 layout (location = 1) in vec4 col;
+layout (location = 2) in vec4 norm;
 layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 out vec4 vCol;
 out vec4 vPos;
+out vec4 vNorm;
 void main() {
   gl_Position = theMat * vec4(pos.xyz,1);
   vCol = col;
   vPos = pos;
+  vNorm = norm;
 }