diff --git a/FinalProject/fragmentshader.fs b/FinalProject/fragmentshader.fs
index 229dce5..620dc74 100644
--- a/FinalProject/fragmentshader.fs
+++ b/FinalProject/fragmentshader.fs
@@ -2,14 +2,30 @@
 out vec4 FragColor;
 
 in vec2 TexCoords;
+in vec3 Normal;  
+in vec3 FragPos;  
 
 uniform sampler2D texture_diffuse1;
 uniform sampler2D texture_specular1;
+// above 2 uniform can caculate objectColor
+
+uniform vec3 lightPos; 
 uniform vec3 lightColor;
 
 void main()
-{    
-    FragColor = texture(texture_specular1, TexCoords);
-    FragColor = texture(texture_diffuse1, TexCoords);
-    FragColor = vec4(FragColor * vec4(lightColor,1.0f));
+{   
+    vec3 objectColor = texture(texture_specular1, TexCoords).rgb;
+    objectColor = texture(texture_diffuse1, TexCoords).rgb;
+    // ambient
+    float ambientStrength = 0;
+    vec3 ambient = ambientStrength * lightColor;
+
+    // diffuse 
+    vec3 norm = normalize(Normal);
+    vec3 lightDir = normalize(lightPos - FragPos);
+    float diff = max(dot(norm, lightDir), 0.0);
+    vec3 diffuse = diff * lightColor;
+
+    vec3 result = (ambient + diffuse) * objectColor;
+    FragColor = vec4(result, 1.0);
 }
\ No newline at end of file
diff --git a/FinalProject/illuminant.fs b/FinalProject/illuminant.fs
new file mode 100644
index 0000000..e69de29
diff --git a/FinalProject/illuminant.vs b/FinalProject/illuminant.vs
new file mode 100644
index 0000000..c875a90
--- /dev/null
+++ b/FinalProject/illuminant.vs
@@ -0,0 +1,11 @@
+#version 430 core
+layout (location = 0) in vec3 aPos;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
+}
\ No newline at end of file
diff --git a/FinalProject/lightCaster.h b/FinalProject/lightCaster.h
index e01b132..d23d3ad 100644
--- a/FinalProject/lightCaster.h
+++ b/FinalProject/lightCaster.h
@@ -3,8 +3,8 @@
 
 // 发光物不需要纹理，所以说需要另外的shader
 // 在sceneviewer中被包含
-class LightCaster {
+class Illuminant {
 public:
-    LightCaster() {};
+    Illuminant() {};
 
 };
\ No newline at end of file
diff --git a/FinalProject/sceneviewer.cpp b/FinalProject/sceneviewer.cpp
index 0f12183..453a00c 100644
--- a/FinalProject/sceneviewer.cpp
+++ b/FinalProject/sceneviewer.cpp
@@ -5,7 +5,7 @@
 #include <qresource.h>
 #include <qurl.h>
 #include <qdir.h>
-
+#include<time.h>
 #include "vbo.h"
 #include "vao.h"
 #include "shader.h"
@@ -89,8 +89,8 @@ void SceneViewer::paintGL() {
     _shaderProgram.setUniform("projection", projection);
     
 
-    ///////////////////////////////////////最终不应该放在这里
-    _shaderProgram.setUniform("lightColor", 0.0f, 1.0f, 0.0f);
+    ///////////////////////////////////////进行光照处理
+    update_light();
     //////////////////////////////////////
 
 
@@ -174,3 +174,10 @@ void SceneViewer::wheelEvent(QWheelEvent* event) {
     // Update the view
     update();
 }
+
+void SceneViewer::update_light() {
+    auto r = time(NULL);
+    Logger::debug("1\n");
+    _shaderProgram.setUniform("lightPos", (float)sin(r), (float)sin(r/4), (float)sin(r/2.1));
+    _shaderProgram.setUniform("lightColor", 1.0f, 1.0f, 1.0f);
+}
diff --git a/FinalProject/sceneviewer.h b/FinalProject/sceneviewer.h
index b45fd4e..2d9bd31 100644
--- a/FinalProject/sceneviewer.h
+++ b/FinalProject/sceneviewer.h
@@ -41,6 +41,7 @@ private:
 public:
 	SceneViewer(QWidget* parent = 0);
 	~SceneViewer();
+    void update_light();
 
 protected:
     // OpenGL functions
diff --git a/FinalProject/vertexshader.vs b/FinalProject/vertexshader.vs
index 73091f6..fc9d2cf 100644
--- a/FinalProject/vertexshader.vs
+++ b/FinalProject/vertexshader.vs
@@ -4,6 +4,8 @@ layout (location = 1) in vec3 aNormal;
 layout (location = 2) in vec2 aTexCoords;
 
 out vec2 TexCoords;
+out vec3 FragPos;
+out vec3 Normal;
 
 uniform mat4 model;
 uniform mat4 view;
@@ -11,6 +13,9 @@ uniform mat4 projection;
 
 void main()
 {
+    FragPos = vec3(model * vec4(aPos, 1.0));
+    Normal = aNormal;  
+
     TexCoords = aTexCoords;    
-    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    gl_Position = projection * view * vec4(FragPos, 1.0);
 }
\ No newline at end of file