Exposed shadow map bias to light gui

data/shaders/fs_deferred_lighting.glsl

@@ -18,6 +18,7 @@ uniform sampler2D uPosition;
 uniform vec3 uLightDirection;
 uniform mat4 uLightSpaceMatrix;
 uniform mat4 uViewToLightSpaceMatrix;
+uniform float uShadowBias;
 
 in vec2 ioFragTexCoords;
 
@@ -30,7 +31,7 @@ float ShadowCalculationPCF(vec4 frag_pos_light_space, vec3 frag_normal_light_spa
 	float current_depth = projected_coordinates.z;
 
 	float bias = 0.00;
-	bias = max(0.02 * (1.0 - dot(frag_normal_light_space, uLightDirection)), 0.003);
+	bias = max(0.01 * (1.0 - dot(frag_normal_light_space, uLightDirection)), uShadowBias);
 
 	float shadow = 0.0;
 	vec2 texel_size = 1.0 / textureSize(uShadowMap, 0);

src/modules/RenderModule.cc

@@ -208,6 +208,7 @@ void Light::DrawGui() {
 	ImGui::SliderFloat("Volume Size", &mBBoxSize, 1.0f, 50.0f);
 	ImGui::SliderFloat("Near", &mNear, -10.0f, 50.0f);
 	ImGui::SliderFloat("Far", &mFar, -10.0f, 50.0f);
+	ImGui::SliderFloat("Shadow Bias", &mShadowBias, 0.0f, 0.01f, "%.5f", 1.0f);
 
 	ImVec2 content_avail = ImGui::GetContentRegionAvail();
 
@@ -699,6 +700,7 @@ void Renderer::RenderGl() {
 		Vector3f light_direction = view_mat_rot * mLight.mDirection.normalized();
 
 		mDeferredLighting.SetVec3("uLightDirection", light_direction.normalized());
+		mDeferredLighting.SetFloat("uShadowBias", mLight.mShadowBias);
 
 		gVertexArray.Bind();
 		gScreenQuad.Draw(GL_TRIANGLES);

src/modules/RenderModule.h

@@ -29,6 +29,7 @@ struct Light {
 	float mNear;
 	float mFar;
 	float mBBoxSize;
+	float mShadowBias = 0.003;
 
 	Matrix44f mLightSpaceMatrix;