spooky light

include/client/render/shader/WorldShader.h

@@ -7,7 +7,7 @@ namespace shader {
 
 class WorldShader : public ShaderProgram {
   private:
-	unsigned int m_LocationProjection = 0, m_LocationView = 0;
+	unsigned int m_LocationProjection = 0, m_LocationView = 0, m_LocationLight = 0;
 
   protected:
 	void GetAllUniformLocation() override;
@@ -19,6 +19,7 @@ class WorldShader : public ShaderProgram {
 
 	void SetProjectionMatrix(const Mat4f& proj) const;
 	void SetViewMatrix(const Mat4f& view) const;
+	void SetLightPosition(const Vec3f& lightPos) const;
 };
 
 }  // namespace shader

src/client/render/MainRenderer.cpp

@@ -1,5 +1,6 @@
 #include "client/render/MainRenderer.h"
 
+#include "blitz/misc/Format.h"
 #include "blitz/misc/Log.h"
 #include "blitz/misc/Maths.h"
 #include "blitz/misc/Time.h"
@@ -84,6 +85,12 @@ void MainRenderer::RenderPlayers() {
 }
 
 void MainRenderer::RenderWorld() {
+	// temporary code
+	if (!m_Client->GetGame()->GetPlayers().empty()) {
+		m_WorldShader->Start();
+		m_WorldShader->SetLightPosition(m_Camera.GetPosition());
+	}
+
 	for (auto& Vao : m_WorldModel.mVaos) {
 		RenderWorld(*Vao.get());
 	}

src/client/render/shader/WorldShader.cpp

@@ -87,7 +87,7 @@ layout(location = 2) in vec3 normal;
 uniform mat4 viewMatrix;
 uniform mat4 projectionMatrix;
 
-uniform vec3 lightPosition = vec3(0, 15, 0);
+uniform vec3 lightPosition;
 
 out vec3 toLightVector;
 out vec3 toCameraVector;
@@ -127,6 +127,11 @@ out vec4 out_color;
 
 void main(void){
 
+	float lightDistance = length(toLightVector);
+
+	const vec3 attenuation = vec3(0.4, 0.1, 0.01);
+	float attenuationFactor = attenuation.x + attenuation.y * lightDistance + attenuation.z * lightDistance * lightDistance;
+
 	vec3 unitNormal = normalize(surfaceNormal);
 	vec3 unitLightVector = normalize(toLightVector);
 	vec3 unitCamVector = normalize(toCameraVector);
@@ -139,7 +144,7 @@ void main(void){
 	float specularFactor = max(0.0, dot(reflectedLightDirection, unitCamVector));
 	float specular = pow(specularFactor, shineDamper) * reflectivity;
 
-	float brightness = diffuse + specular;
+	float brightness = (diffuse + specular) / attenuationFactor;
 
 	out_color = vec4(1.0, 1.0, 1.0, 1.0) * brightness * texture(textureSampler, pass_textureCoords);
 
@@ -155,6 +160,7 @@ void WorldShader::LoadShader() {
 
 void WorldShader::GetAllUniformLocation() {
 	m_LocationProjection = static_cast<unsigned int>(GetUniformLocation("projectionMatrix"));
+	m_LocationLight = static_cast<unsigned int>(GetUniformLocation("lightPosition"));
 	m_LocationView = static_cast<unsigned int>(GetUniformLocation("viewMatrix"));
 }
 
@@ -166,5 +172,9 @@ void WorldShader::SetViewMatrix(const Mat4f& view) const {
 	LoadMat4(m_LocationView, view);
 }
 
+void WorldShader::SetLightPosition(const Vec3f& lightPos) const {
+	LoadVector(m_LocationLight, lightPos);
+}
+
 }  // namespace shader
 }  // namespace blitz