使用cpu创建全屏画布

main.cpp

@@ -87,7 +87,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	glewInit();
 
 	/*´´½¨program*/
-	GLuint program = CreateGPUProgram("res/shader/UI.vs", "res/shader/UI.fs");
+	GLuint program = CreateGPUProgram("res/shader/UI FullScreemQuad.vs", "res/shader/UI.fs");
 
 	GLuint posLocation, texcoordLocation, normalLocation, MLocation, VLocation, PLocation, NMLocation, textureLocation;
 	posLocation = glGetAttribLocation(program, "pos");
@@ -109,27 +109,6 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 		printf("load obj model fail\n");
 	}
 
-	float z = 4.0f;
-	float halfFOV = 22.5f;
-	float randianHalfFOV = 3.14 * halfFOV / 180.0f;//½Ç¶Èת»¡¶È
-	float tanHalfFOV = sinf(randianHalfFOV) / cosf(randianHalfFOV);
-	float y = tanHalfFOV * z;
-	float aspect = (float)windowWidth / (float)windowHeight;
-	float x = y * aspect;
-
-	vertexes[0].position[0] = -x;
-	vertexes[0].position[1] = -y;
-
-	vertexes[1].position[0] = x;
-	vertexes[1].position[1] = -y;
-
-	vertexes[2].position[0] = -x;
-	vertexes[2].position[1] = y;
-
-	vertexes[3].position[0] = x;
-	vertexes[3].position[1] = y;
-
-
 	/*´´½¨vbo*/
 	GLuint vbo = CreateBufferObject(GL_ARRAY_BUFFER, sizeof(VertexData) * vertexCount, GL_STATIC_DRAW, vertexes);
 

res/shader/UI FullScreemQuad.vs

@@ -0,0 +1,16 @@
+attribute vec3 pos;
+attribute vec2 texcoord;
+attribute vec3 normal;
+
+uniform mat4 M;
+uniform mat4 V;
+uniform mat4 P;
+uniform mat4 NM;
+
+varying vec2 V_Texcoord;
+
+void main() {
+	vec4 position = vec4(pos.x*2,pos.y*2,pos.z,1.0);
+	V_Texcoord = texcoord;
+	gl_Position = position;	
+}

shader2.vcxproj

@@ -157,6 +157,7 @@
   <ItemGroup>
     <None Include="res\shader\test.fs" />
     <None Include="res\shader\test.vs" />
+    <None Include="res\shader\UI FullScreemQuad.vs" />
     <None Include="res\shader\UI.fs" />
     <None Include="res\shader\UI.vs" />
   </ItemGroup>

shader2.vcxproj.filters

@@ -46,5 +46,8 @@
     <None Include="res\shader\UI.vs">
       <Filter>源文件</Filter>
     </None>
+    <None Include="res\shader\UI FullScreemQuad.vs">
+      <Filter>源文件</Filter>
+    </None>
   </ItemGroup>
 </Project>