diffuse漫反射实现，存在问题

main.cpp

@@ -90,13 +90,14 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	/*创建program*/
 	GLuint program = CreateGPUProgram("res/shader/test.vs", "res/shader/test.fs");
 
-	GLuint posLocation, texcoordLocation, normalLocation, MLocation, VLocation, PLocation;
+	GLuint posLocation, texcoordLocation, normalLocation, MLocation, VLocation, PLocation, NMLocation;
 	posLocation = glGetAttribLocation(program, "pos");
 	texcoordLocation = glGetAttribLocation(program, "texcoord");
 	normalLocation = glGetAttribLocation(program, "normal");
 	MLocation = glGetUniformLocation(program, "M");
 	VLocation = glGetUniformLocation(program, "V");
 	PLocation = glGetUniformLocation(program, "P");
+	NMLocation = glGetUniformLocation(program, "NM");
 
 	/*load model*/
 	unsigned int *indexes = nullptr;
@@ -113,7 +114,8 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	/*创建IBO*/
 	GLuint ibo = CreateBufferObject(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * indexCount, GL_STATIC_DRAW, indexes);
 
-	glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
+	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+	//glEnable(GL_DEPTH_TEST);
 
 	//创建一个单位矩阵和一个投影矩阵，后面用来传递到shader
 	float identify[] = {
@@ -122,8 +124,9 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 		0,0,1,0,
 		0,0,0,1
 	};
-	glm::mat4 model = glm::translate(0.0f, 0.0f, -5.0f);
+	glm::mat4 model = glm::translate(0.0f, 0.0f, -3.0f);
 	glm::mat4 projection = glm::perspective(45.0f, 800.0f/600.0f, 0.1f, 1000.0f);
+	glm::mat4 normalMatrix = glm::inverseTranspose(model);
 
 	/*显示窗口*/
 	ShowWindow(hwnd, SW_SHOW);
@@ -146,6 +149,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 		glUniformMatrix4fv(MLocation, 1, GL_FALSE, glm::value_ptr(model));
 		glUniformMatrix4fv(VLocation, 1, GL_FALSE, identify);
 		glUniformMatrix4fv(PLocation, 1, GL_FALSE, glm::value_ptr(projection));
+		glUniformMatrix4fv(NMLocation, 1, GL_FALSE, glm::value_ptr(normalMatrix));
 
 		glBindBuffer(GL_ARRAY_BUFFER, vbo);
 		glEnableVertexAttribArray(posLocation);

res/shader/test.fs

@@ -1,3 +1,23 @@
+varying vec3 V_Normal;
+
 void main() {
-	gl_FragColor = vec4(1.0);
+
+	vec3 lightPos = vec3(0.0, 10.0, 0.0);
+	vec3 L=lightPos;
+	L = normalize(L);
+	vec3 n = normalize(V_Normal);
+
+
+	//ambient
+	vec4 AmbientLightColor = vec4(0.2, 0.2, 0.2, 1.0);
+	vec4 AmbientMaterial = vec4(0.2, 0.2, 0.2, 1.0);
+	vec4 AmbientColor = AmbientLightColor*AmbientMaterial;
+
+	//diffuse
+	vec4 DiffuseLightColor = vec4(1.0,1.0,1.0,1.0);
+	vec4 DiffuseMaterial = vec4(0.2, 0.2, 0.2, 1.0);
+	vec4 diffuseColor = DiffuseLightColor*DiffuseMaterial*max(0.0, dot(L,n));
+
+
+	gl_FragColor = AmbientColor + diffuseColor;
 }

res/shader/test.vs

@@ -5,7 +5,10 @@ attribute vec3 normal;
 uniform mat4 M;
 uniform mat4 V;
 uniform mat4 P;
+uniform mat4 NM;
 
+varying vec3 V_Normal;
 void main() {
+	V_Normal = mat3(NM)*normal;
 	gl_Position = P*V*M*vec4(pos,1.0);	
 }

shader2.vcxproj.user

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup />
+</Project>