点光源

Res/direction_light.fs

@@ -0,0 +1,32 @@
+uniform vec4 U_AmbientMaterial;
+uniform vec4 U_AmbientLight;
+uniform vec4 U_DiffuseMaterial;
+uniform vec4 U_DiffuseLight;
+uniform vec4 U_SpecularMaterial;
+uniform vec4 U_SpecularLight;
+uniform vec4 U_LightPos;
+uniform vec4 U_CameraPos;
+varying vec4 V_Normal;
+varying vec4 V_WorldPos;
+
+void main(){
+	//ambient
+	vec4 ambientColor = U_AmbientMaterial * U_AmbientLight;
+
+	//diffuse
+	vec3 n = normalize(V_Normal.xyz);
+	vec3 l = normalize(U_LightPos - vec3(0));
+	float duffuseIntensity = max(0.0, dot(l,n));
+	vec4 duffuseColor = U_DiffuseMaterial * U_DiffuseLight * duffuseIntensity;
+
+	//specular
+	vec4 specularColor = vec4(0);
+	if(duffuseIntensity > 0){
+		vec3 rd = normalize(reflect(-l,n));
+		vec3 vd = normalize((U_CameraPos - V_WorldPos).xyz);
+		float specularIntensity = pow(max(0.0,dot(vd,rd)), 128);
+		specularColor = U_SpecularMaterial * U_SpecularLight * specularIntensity;
+	}
+
+	gl_FragColor = ambientColor + duffuseColor + specularColor;
+}

Res/direction_light.vs

@@ -0,0 +1,14 @@
+attribute vec4 position;
+attribute vec4 texcoord;
+attribute vec4 normal;
+uniform mat4 ModelMatrix;
+uniform mat4 ProjectionMatrix;
+uniform mat4 ViewMatrix;
+uniform mat4 IT_ModelMatrix;
+varying vec4 V_Normal;
+varying vec4 V_WorldPos;
+void main(){
+	V_WorldPos = ModelMatrix * position;
+	V_Normal = IT_ModelMatrix * normal;
+	gl_Position = ProjectionMatrix * ViewMatrix * ModelMatrix * position;
+}

Res/point_light.fs

@@ -0,0 +1,43 @@
+uniform vec4 U_AmbientMaterial;
+uniform vec4 U_AmbientLight;
+uniform vec4 U_DiffuseMaterial;
+uniform vec4 U_DiffuseLight;
+uniform vec4 U_SpecularMaterial;
+uniform vec4 U_SpecularLight;
+uniform vec4 U_LightPos;
+uniform vec4 U_CameraPos;
+varying vec4 V_Normal;
+varying vec4 V_WorldPos;
+
+void main(){
+	//ambient
+	vec4 ambientColor = U_AmbientMaterial * U_AmbientLight;
+
+	//diffuse
+	vec3 n = normalize(V_Normal.xyz);
+	vec3 l = normalize(U_LightPos.xyz - V_WorldPos.xyz);
+	float duffuseIntensity = max(0.0, dot(l,n));
+	
+	//·½Ïò¹âË¥¼õ¼ÆËã
+	float attenuation = 1.0;
+	float distance = 0;
+	float constantFactor = 0.5;
+	float linearFactor = 0.3;
+	float expFactor = 0.1;
+
+	distance =length(U_LightPos.xyz - V_WorldPos.xyz);
+	attenuation = 1.0 / (constantFactor + linearFactor*distance + expFactor*distance*distance);
+
+	vec4 duffuseColor = U_DiffuseMaterial * U_DiffuseLight * duffuseIntensity * attenuation;
+
+	//specular
+	vec4 specularColor = vec4(0);
+	if(duffuseIntensity > 0){
+		vec3 rd = normalize(reflect(-l,n));
+		vec3 vd = normalize((U_CameraPos - V_WorldPos).xyz);
+		float specularIntensity = pow(max(0.0,dot(vd,rd)), 128);
+		specularColor = U_SpecularMaterial * U_SpecularLight * specularIntensity;
+	}
+
+	gl_FragColor = ambientColor + duffuseColor + specularColor;
+}

Res/point_light.vs

@@ -0,0 +1,14 @@
+attribute vec4 position;
+attribute vec4 texcoord;
+attribute vec4 normal;
+uniform mat4 ModelMatrix;
+uniform mat4 ProjectionMatrix;
+uniform mat4 ViewMatrix;
+uniform mat4 IT_ModelMatrix;
+varying vec4 V_Normal;
+varying vec4 V_WorldPos;
+void main(){
+	V_WorldPos = ModelMatrix * position;
+	V_Normal = IT_ModelMatrix * normal;
+	gl_Position = ProjectionMatrix * ViewMatrix * ModelMatrix * position;
+}

renderFramework.vcxproj

@@ -149,8 +149,8 @@
     <ClInclude Include="vertexbuffer.h" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Res\blin.fs" />
-    <None Include="Res\blin.vs" />
+    <None Include="Res\point_light.fs" />
+    <None Include="Res\point_light.vs" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

renderFramework.vcxproj.filters

@@ -62,10 +62,10 @@
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
-    <None Include="Res\blin.fs">
+    <None Include="Res\point_light.fs">
       <Filter>源文件</Filter>
     </None>
-    <None Include="Res\blin.vs">
+    <None Include="Res\point_light.vs">
       <Filter>源文件</Filter>
     </None>
   </ItemGroup>

scene.cpp

@@ -13,7 +13,7 @@ FullScreenQuad *fsq;
 void Init()
 {
 	model.Init("Res/Sphere.obj");
-	model.mShader->Init("Res/blin.vs", "Res/blin.fs");
+	model.mShader->Init("Res/point_light.vs", "Res/point_light.fs");
 	model.SetPosition(0.0f, 0.0f, 0.0f);
 
 	//设置环境光参数
@@ -21,7 +21,7 @@ void Init()
 	model.mShader->SetVec4("U_AmbientLight", 0.1f, 0.1f, 0.1f, 1.0f);
 	
 	//设置环境光参数
-	model.mShader->SetVec4("U_LightPos", 0.0f, 1.0f, 0.0f, 0.0f);
+	model.mShader->SetVec4("U_LightPos", 0.0f, 1.4f, 0.0f, 0.0f);
 	model.SetDiffuseMaterial(0.4f, 0.4f, 0.4f, 1.0f);
 	model.mShader->SetVec4("U_DiffuseLight", 0.8f, 0.8f, 0.8f, 1.0f);