Fixed directional shadows.

Shader/depth.fsh

@@ -1,16 +1,7 @@
 #version 150
 
-in vec4 fragPosition;
-
-uniform float farPlane;
-
 out float gl_FragDepth;
 
 void main() {
-    float nearPlane = 0.1;
-    float A = -(farPlane+nearPlane)/(farPlane-nearPlane);
-    float B = -2*(farPlane*nearPlane)/(farPlane - nearPlane);
-    float value = 0.5*(-A*length(fragPosition) + B)/length(fragPosition) + 0.5;
-    gl_FragDepth = value;
-    //gl_FragDepth = length(fragPosition)/farPlane;
+    gl_FragDepth = gl_FragCoord.z;
 }

Shader/depth.vsh

@@ -5,11 +5,7 @@ in vec3 aNormal;
 in vec3 aTexcoord;
 
 uniform mat4 modelViewProjectionMatrix;
-uniform mat4 modelViewMatrix;
-
-out vec4 fragPosition;
 
 void main() {
-    fragPosition = modelViewMatrix * vec4(aPosition, 1.0);
     gl_Position = modelViewProjectionMatrix * vec4(aPosition, 1.0);
 }

Shader/depth_cube.fsh

@@ -0,0 +1,16 @@
+#version 150
+
+in vec4 fragPosition;
+
+uniform float farPlane;
+
+out float gl_FragDepth;
+
+void main() {
+    float nearPlane = 0.1;
+    float A = -(farPlane+nearPlane)/(farPlane-nearPlane);
+    float B = -2*(farPlane*nearPlane)/(farPlane - nearPlane);
+    float value = 0.5*(-A*length(fragPosition) + B)/length(fragPosition) + 0.5;
+    gl_FragDepth = value;
+    //gl_FragDepth = length(fragPosition)/farPlane;
+}

Shader/depth_cube.vsh

@@ -0,0 +1,15 @@
+#version 150
+
+in vec3 aPosition;
+in vec3 aNormal;
+in vec3 aTexcoord;
+
+uniform mat4 modelViewProjectionMatrix;
+uniform mat4 modelViewMatrix;
+
+out vec4 fragPosition;
+
+void main() {
+    fragPosition = modelViewMatrix * vec4(aPosition, 1.0);
+    gl_Position = modelViewProjectionMatrix * vec4(aPosition, 1.0);
+}

Shader/phong.fsh

@@ -101,7 +101,8 @@ float samplePointShadow(samplerCubeShadow shadowMap, vec3 lightDirection) {
     float A = -(farPlane+nearPlane)/(farPlane-nearPlane);
     float B = -2*(farPlane*nearPlane)/(farPlane - nearPlane);
     float compValue = 0.5*(-A*length(lightDirection) + B)/length(lightDirection) + 0.5;
-    float bias = 0.005;
+    float bias = 0.001*tan(acos(clamp(dot(vNormal, -directionalLightVector), 0.0, 1.0)));
+    bias = clamp(bias, 0.0, 0.01);
     //return texture(shadowMap, vec4(lightDirection , length(lightDirection)/farPlane - bias));
     return texture(shadowMap, vec4(lightDirection , compValue - bias));
 }

graphics.cc

@@ -42,6 +42,9 @@ void Graphics::init(Level* level) {
     depthShader = ShaderProgramCreator("depth")
         .attributeLocations(vao->getAttributeLocations()).create();
 
+    depthCubeShader = ShaderProgramCreator("depth_cube")
+        .attributeLocations(vao->getAttributeLocations()).create();
+
     depthTexture = SharedTexture2D( new Texture2D(windowSize, GL_DEPTH_COMPONENT24));
     depthTexture->setMinFilter(GL_NEAREST);
     depthTexture->setMagFilter(GL_NEAREST);
@@ -88,8 +91,8 @@ glm::uvec2 Graphics::getWindowSize() {
 void Graphics::render(double time)
 {
     // At first render shadows
-    depthShader->use();
-    depthShader->setUniform("farPlane", farPlane);
+    depthCubeShader->use();
+    depthCubeShader->setUniform("farPlane", farPlane);
     // render depth textures for point lights
     glViewport(0, 0, cube_size, cube_size);
     glm::mat4 depthProjectionMatrix_pointlights = glm::perspective(1.571f, (float)cube_size/(float)cube_size, 0.1f,  farPlane);
@@ -109,13 +112,14 @@ void Graphics::render(double time)
             glm::mat4 depthViewProjectionMatrix_face = depthProjectionMatrix_pointlights * viewMatrix;
             std::vector<glm::mat4> viewMatrixVector = std::vector<glm::mat4>();
             viewMatrixVector.push_back(viewMatrix);
-            level->render(depthShader, false, &depthViewProjectionMatrix_face, &viewMatrixVector);
+            level->render(depthCubeShader, false, &depthViewProjectionMatrix_face, &viewMatrixVector);
             if (!framebuffer_cube->isFrameBufferObjectComplete()) {
                 printf("Framebuffer incomplete, unknown error occured during shadow generation!\n");
             }
         }
     }
     // render depth texture for sun
+    depthShader->use();
     glViewport(0, 0, windowSize.x, windowSize.y);
     
     // far pass

graphics.hh

@@ -26,6 +26,7 @@ class Graphics {
         float nearPlane;
         float farPlane;
         ACGL::OpenGL::SharedShaderProgram lightingShader;
+        ACGL::OpenGL::SharedShaderProgram depthCubeShader;
         ACGL::OpenGL::SharedShaderProgram depthShader;
         ACGL::OpenGL::SharedTexture2D depthTexture;
         ACGL::OpenGL::SharedFrameBufferObject framebuffer;