Add lighting on walls, imperfect

shader/lightmapCircle.geom

@@ -18,16 +18,16 @@ void main()
   cenPosT = vec2 ( (cenPos.x + 1) * 0.5 * winSize.x , (cenPos.y + 1) * 0.5 * winSize.y);
 
   dField = vec2 ( 1, 1);
-  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, -0.2 , 1);
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, -0 , 1);
   EmitVertex();
   dField = vec2 (-1, 1);
-  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, -0.2 , 1);
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, -0 , 1);
   EmitVertex();
   dField = vec2 ( 1,-1);
-  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, -0.2 , 1);
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, -0 , 1);
   EmitVertex();
   dField = vec2 (-1,-1);
-  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, -0.2 , 1);
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, -0 , 1);
   EmitVertex();
 
   EndPrimitive();

shader/lightmapWall.frag

@@ -0,0 +1,13 @@
+#version 430 core
+in vec2 cenPosT;
+in float lum;
+
+in vec3 dField;
+
+out vec4 fColor;
+
+void main()
+{
+  float c = pow (1 - min(1, dot(dField,dField)) , 2) * lum ;
+  fColor = vec4(c,c,c,c);
+}

shader/lightmapWall.geom

@@ -0,0 +1,86 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+
+out vec3 dField;
+out float lum;
+
+uniform vec2 lightPos;
+uniform mat4 perpMat;
+uniform vec2 radLum;
+
+float isLHS (vec2 startV, vec2 testV)
+{
+    return sign( -startV.x * testV.y + startV.y * testV.x);
+}
+vec4 shiftUp (vec4 v)
+{ return vec4 (v.xy , v.z-0.1 , v.w) ; }
+
+void main()
+{
+vec4 p1 = vec4 (gl_in[0].gl_Position.xy,0,1);
+vec4 p2 = vec4 (gl_in[0].gl_Position.zw,0,1);
+if (isLHS (p1.xy - lightPos, p2.xy - lightPos) < 0)
+{
+    lum = radLum.y;
+    float rad = radLum.x;
+
+    vec4 p3 = vec4 (p1.xy,-0.2,1);
+    vec4 p4 = vec4 (p2.xy,-0.2,1);
+
+    vec2 d1 = p1.xy - lightPos;
+    vec2 d2 = p2.xy - lightPos;
+    
+    vec4 a1 = shiftUp( perpMat * p1 );
+    vec4 a2 = shiftUp( perpMat * p2 );
+    vec4 a3 = shiftUp( perpMat * p3 );
+    vec4 a4 = shiftUp( perpMat * p4 );
+    
+    dField = vec3( d1.x/rad, d1.y/rad, 0);
+    gl_Position = a1; 
+    EmitVertex();
+    dField = vec3( d1.x/rad, d1.y/rad, 1);
+    gl_Position = a3; 
+    EmitVertex();
+    dField = vec3( d2.x/rad, d2.y/rad, 0);
+    gl_Position = a2; 
+    EmitVertex();
+    dField = vec3( d2.x/rad, d2.y/rad, 1);
+    gl_Position = a4; 
+    EmitVertex();
+    
+    EndPrimitive();
+} else {}
+}
+
+//  //  void main()
+//  //  {
+//  //    vec4 frontL4 = worldMat * vec4(gl_in[0].gl_Position.xy, 0 ,1);
+//  //    vec4 frontR4 = worldMat * vec4(gl_in[0].gl_Position.zw, 0 ,1);
+//  //    vec2 frontL = frontL4.xy;
+//  //    vec2 frontR = frontR4.xy;
+//  //  
+//  //      emitLine (frontR);
+//  //      emitLine (frontL);
+//  //    EndPrimitive();
+//  //  }
+//  gl_Position = perspective * worldMat * p4; EmitVertex();
+//  gl_Position = perspective * worldMat * p3; EmitVertex();
+//  gl_Position = perspective * worldMat * p7; EmitVertex();
+//  gl_Position = perspective * worldMat * p8; EmitVertex();
+//  gl_Position = perspective * worldMat * p5; EmitVertex();
+//  gl_Position = perspective * worldMat * p3; EmitVertex();
+//  gl_Position = perspective * worldMat * p1; EmitVertex();
+//  gl_Position = perspective * worldMat * p4; EmitVertex();
+//  gl_Position = perspective * worldMat * p2; EmitVertex();
+//  gl_Position = perspective * worldMat * p7; EmitVertex();
+//  gl_Position = perspective * worldMat * p6; EmitVertex();
+//  gl_Position = perspective * worldMat * p5; EmitVertex();
+//void emitLine (vec2 pa)
+//{
+//    gl_Position = vec4 (pa, 0, 1);
+//    EmitVertex();
+//    gl_Position = shift (vec4 (pa,0,1)); //vec4 (pa + (200 * (pa - lightPosa)), 0 , 1);
+//    EmitVertex();
+//}
+

shader/lightmapWall.vert

@@ -0,0 +1,7 @@
+#version 430 core
+layout (location = 0) in vec4 poss;
+
+void main()
+{
+  gl_Position = poss;
+}

shader/wallShadow.geom

@@ -23,12 +23,12 @@ vec4 p1 = vec4 (gl_in[0].gl_Position.xy,0,1);
 vec4 p2 = vec4 (gl_in[0].gl_Position.zw,0,1);
 if (isLHS (p1.xy - lightPos, p2.xy - lightPos) < 0)
 {
-vec4 p3 = vec4 (p1.xy,-0.2,1);
-vec4 p4 = vec4 (p2.xy,-0.2,1);
+vec4 p3 = vec4 (p1.xy,-0.5,1);
+vec4 p4 = vec4 (p2.xy,-0.5,1);
 vec4 p5 = shift(p1);
 vec4 p6 = shift(p2);
-vec4 p7 = vec4 (p6.xy,-0.2,1);
-vec4 p8 = vec4 (p5.xy,-0.2,1);
+vec4 p7 = vec4 (p6.xy,-0.5,1);
+vec4 p8 = vec4 (p5.xy,-0.5,1);
 
 vec4 a1 = perpMat * p1;
 vec4 a2 = perpMat * p2;