绘制depthmap

main.cpp

@@ -91,18 +91,16 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	glewInit();
 
 	/*创建program*/
-	GLuint program = CreateGPUProgram("res/shader/MixLightMT.vs", "res/shader/MixLightMT.fs");
+	GLuint program = CreateGPUProgram("res/shader/ViewDepthMap.vs", "res/shader/ViewDepthMap.fs");
 
-	GLuint posLocation, texcoordLocation, normalLocation, MLocation, VLocation, PLocation, NMLocation, textureLocation, offsetLocation;
+	GLuint posLocation, texcoordLocation, normalLocation, MLocation, VLocation, PLocation;
 	posLocation = glGetAttribLocation(program, "pos");
 	texcoordLocation = glGetAttribLocation(program, "texcoord");
 	normalLocation = glGetAttribLocation(program, "normal");
-	offsetLocation = glGetAttribLocation(program, "offset");
+
 	MLocation = glGetUniformLocation(program, "M");
 	VLocation = glGetUniformLocation(program, "V");
 	PLocation = glGetUniformLocation(program, "P");
-	NMLocation = glGetUniformLocation(program, "NM");
-	textureLocation = glGetUniformLocation(program, "U_MainTexture");
 
 	/*load model*/
 	unsigned int *indexes = nullptr;
@@ -121,10 +119,10 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	glBindBuffer(GL_ARRAY_BUFFER, vbo);
 	glEnableVertexAttribArray(posLocation);
 	glVertexAttribPointer(posLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)0);
-	glEnableVertexAttribArray(texcoordLocation);
+	/*glEnableVertexAttribArray(texcoordLocation);
 	glVertexAttribPointer(texcoordLocation, 2, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)(sizeof(float) * 3));
 	glEnableVertexAttribArray(normalLocation);
-	glVertexAttribPointer(normalLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)(sizeof(float) * 5));
+	glVertexAttribPointer(normalLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)(sizeof(float) * 5));*/
 	glBindBuffer(GL_ARRAY_BUFFER, 0);
 
 	/*创建IBO*/
@@ -133,10 +131,6 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	/*创建纹理*/
 	GLuint mainTexture = CreateTextureFromFile("res/image/niutou.bmp");
 
-	/*创建FBO*/
-	GLuint colorBuffer, depthBuffer, colorBuffer2;
-	GLuint fbo = CreateFramebufferObject(colorBuffer, depthBuffer, windowWidth, windowHeight, &colorBuffer2);
-
 	glViewport(0, 0, windowWidth, windowHeight);
 
 	GL_CALL(glClearColor(0.1f, 0.4f, 0.7f, 1.0f));
@@ -150,7 +144,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 		0,0,0,1
 	};
 
-	glm::mat4 model = glm::translate(0.0f, -0.5f, -3.0f) * glm::rotate(-90.0f, 0.0f, 1.0f, 0.0f)*glm::scale(0.01f,0.01f,0.01f);
+	glm::mat4 model = glm::translate(0.0f, -0.5f, -2.0f) * glm::rotate(-90.0f, 0.0f, 1.0f, 0.0f)*glm::scale(0.01f,0.01f,0.01f);
 	glm::mat4 projection = glm::perspective(45.0f, (float)windowWidth / (float)windowHeight, 0.1f, 1000.0f);
 	glm::mat4 normalMatrix = glm::inverseTranspose(model);
 
@@ -169,10 +163,6 @@ 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));
-
-		glBindTexture(GL_TEXTURE_2D, colorBuffer);
-		glUniform1i(textureLocation, 0);
 
 		glUniformMatrix4fv(MLocation, 1, GL_FALSE, glm::value_ptr(model));
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
@@ -198,37 +188,10 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 		}
 
 		//绘制内容到fbo
-		glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 		GL_CALL(glClearColor(0.1f, 0.4f, 0.7f, 1.0f));
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		what();
-		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
-		//把fbo绘制到一个四边形上
-		GL_CALL(glClearColor(0.5f, 0.4f, 0.7f, 1.0f));
-		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-		glEnable(GL_TEXTURE_2D);
-		glEnable(GL_SCISSOR_TEST);
-
-		glBindTexture(GL_TEXTURE_2D, colorBuffer);
-		glScissor(0, 0, windowWidth, windowHeight/2);
-		glBegin(GL_QUADS);
-		glTexCoord2f(0.0f, 0.0f); glVertex3f(-0.5f, -0.5f, -1.0f);
-		glTexCoord2f(1.0f, 0.0f); glVertex3f(0.5f, -0.5f, -1.0f);
-		glTexCoord2f(1.0f, 1.0f); glVertex3f(0.5f, 0.5f, -1.0f);
-		glTexCoord2f(0.0f, 1.0f); glVertex3f(-0.5f, 0.5f, -1.0f);
-		glEnd();
-
-		glBindTexture(GL_TEXTURE_2D, colorBuffer2);
-		glScissor(0, windowHeight / 2, windowWidth, windowHeight / 2);
-		glBegin(GL_QUADS);
-		glTexCoord2f(0.0f, 0.0f); glVertex3f(-0.5f, -0.5f, -1.0f);
-		glTexCoord2f(1.0f, 0.0f); glVertex3f(0.5f, -0.5f, -1.0f);
-		glTexCoord2f(1.0f, 1.0f); glVertex3f(0.5f, 0.5f, -1.0f);
-		glTexCoord2f(0.0f, 1.0f); glVertex3f(-0.5f, 0.5f, -1.0f);
-		glEnd();
-		
-		glDisable(GL_SCISSOR_TEST);
 		SwapBuffers(dc);
 	}
 

res/shader/ViewDepthMap.fs

@@ -0,0 +1,3 @@
+void main() {
+	gl_FragColor = vec4(vec3(pow(gl_FragCoord.z,32.0)), 1.0);
+}

res/shader/ViewDepthMap.vs

@@ -0,0 +1,10 @@
+attribute vec3 pos;
+attribute vec2 texcoord;
+attribute vec3 normal;
+
+uniform mat4 M;
+uniform mat4 V;
+uniform mat4 P;
+void main() {
+	gl_Position = P*V*M*vec4(pos, 1.0);	
+}

shader2.vcxproj

@@ -159,8 +159,8 @@
     <ClInclude Include="timer.h" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="res\shader\MixLightMT.fs" />
-    <None Include="res\shader\MixLightMT.vs" />
+    <None Include="res\shader\ViewDepthMap.fs" />
+    <None Include="res\shader\ViewDepthMap.vs" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

shader2.vcxproj.filters

@@ -46,10 +46,10 @@
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
-    <None Include="res\shader\MixLightMT.fs">
+    <None Include="res\shader\ViewDepthMap.fs">
       <Filter>源文件</Filter>
     </None>
-    <None Include="res\shader\MixLightMT.vs">
+    <None Include="res\shader\ViewDepthMap.vs">
       <Filter>源文件</Filter>
     </None>
   </ItemGroup>