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提取深度缓冲区

master
blobt 4 years ago
parent
4266fe4133
commit
cfd9f93fef
4 changed files with 80 additions and 21 deletions
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  1. 88
      main.cpp
  2. 9
      res/shader/RenderDepthBuffer.fs
  3. 1
      shader2.vcxproj
  4. 3
      shader2.vcxproj.filters

88
main.cpp
View File

@ -91,7 +91,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
glewInit();
/*创建program*/
GLuint program = CreateGPUProgram("res/shader/UI FullScreemQuad.vs", "res/shader/SimpleTexture.fs");
GLuint program = CreateGPUProgram("res/shader/SimpleTexture.vs", "res/shader/SimpleTexture.fs");
GLuint posLocation, texcoordLocation, normalLocation, MLocation, VLocation, PLocation, textureLocation;
posLocation = glGetAttribLocation(program, "pos");
@ -108,7 +108,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
int vertexCount = 0, indexCount = 0;
Timer t;
t.Start();
VertexData* vertexes = LoadObjModel("res/model/Quad.obj", &indexes, vertexCount, indexCount);
VertexData* vertexes = LoadObjModel("res/model/niutou.obj", &indexes, vertexCount, indexCount);
printf("load model cost %fs %d\n", t.GetPassedTime(), t.GetPassedTickers());
if (vertexes == nullptr) {
@ -116,18 +116,60 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
}
/*创建vbo*/
GLuint vbo = CreateBufferObject(GL_ARRAY_BUFFER, sizeof(VertexData) * vertexCount, GL_STATIC_DRAW, vertexes);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glEnableVertexAttribArray(posLocation);
glVertexAttribPointer(posLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)0);
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));*/
glBindBuffer(GL_ARRAY_BUFFER, 0);
GLuint vao = CreateVAOWithVBOSettings([&]()->void
{
GLuint vbo = CreateBufferObject(GL_ARRAY_BUFFER, sizeof(VertexData) * vertexCount, GL_STATIC_DRAW, vertexes);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glEnableVertexAttribArray(posLocation);
glVertexAttribPointer(posLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)0);
glEnableVertexAttribArray(texcoordLocation);
glVertexAttribPointer(texcoordLocation, 2, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)(sizeof(float) * 3));
});
/*创建IBO*/
GLuint ibo = CreateBufferObject(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * indexCount, GL_STATIC_DRAW, indexes);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/*创建fsqprogram*/
GLuint fsqprogram = CreateGPUProgram("res/shader/UI FullScreemQuad.vs", "res/shader/RenderDepthBuffer.fs");
GLuint fsqposLocation, fsqtexcoordLocation, fsqnormalLocation, fsqMLocation, fsqVLocation, fsqPLocation, fsqtextureLocation;
fsqposLocation = glGetAttribLocation(fsqprogram, "pos");
fsqtexcoordLocation = glGetAttribLocation(fsqprogram, "texcoord");
fsqnormalLocation = glGetAttribLocation(fsqprogram, "normal");
fsqMLocation = glGetUniformLocation(fsqprogram, "M");
fsqVLocation = glGetUniformLocation(fsqprogram, "V");
fsqPLocation = glGetUniformLocation(fsqprogram, "P");
textureLocation = glGetUniformLocation(program, "U_MainTexture");
/*load model*/
unsigned int *fsqindexes = nullptr;
int fsqvertexCount = 0, fsqindexCount = 0;
Timer t2;
t2.Start();
VertexData* fsqvertexes = LoadObjModel("res/model/Quad.obj", &fsqindexes, fsqvertexCount, fsqindexCount);
printf("load model cost %fs %d\n", t2.GetPassedTime(), t2.GetPassedTickers());
if (fsqvertexes == nullptr) {
printf("load obj model fail\n");
}
/*创建fsqvbo*/
GLuint fsqvao = CreateVAOWithVBOSettings([&]()->void
{
GLuint fsqvbo = CreateBufferObject(GL_ARRAY_BUFFER, sizeof(VertexData) * fsqvertexCount, GL_STATIC_DRAW, fsqvertexes);
glBindBuffer(GL_ARRAY_BUFFER, fsqvbo);
glEnableVertexAttribArray(fsqposLocation);
glVertexAttribPointer(fsqposLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)0);
glEnableVertexAttribArray(fsqtexcoordLocation);
glVertexAttribPointer(fsqtexcoordLocation, 2, GL_FLOAT, GL_FALSE, sizeof(VertexData), (void*)(sizeof(float) * 3));
});
/*创建fsqIBO*/
GLuint fsqibo = CreateBufferObject(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * fsqindexCount, GL_STATIC_DRAW, fsqindexes);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/*创建纹理*/
GLuint mainTexture = CreateTextureFromFile("res/image/niutou.bmp");
@ -161,7 +203,6 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
MSG msg;
auto what = [&]()->void {
glm::mat4 normalMatrix = glm::inverseTranspose(model);
glUseProgram(program);
glUniformMatrix4fv(MLocation, 1, GL_FALSE, glm::value_ptr(model));
@ -171,10 +212,23 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
glBindTexture(GL_TEXTURE_2D, mainTexture);
glUniform1i(textureLocation, 0);
glBindVertexArray(vao);
glUniformMatrix4fv(MLocation, 1, GL_FALSE, glm::value_ptr(model));
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
glDrawElements(GL_TRIANGLES, indexCount, GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
glUseProgram(0);
};
auto RenderFullScreenQuad = [&]()->void {
glUseProgram(fsqprogram);
glBindVertexArray(fsqvao);
glBindTexture(GL_TEXTURE_2D, depthBuffer);
glUniform1i(fsqtextureLocation, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, fsqibo);
glDrawElements(GL_TRIANGLES, fsqindexCount, GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
glUseProgram(0);
};
@ -199,15 +253,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, colorBuffer);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-0.5f, -0.5f, -2.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(0.5f, -0.5f, -2.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(0.5f, 0.5f, -2.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-0.5f, 0.5f, -2.0f);
glEnd();
RenderFullScreenQuad();
glFlush();
SwapBuffers(dc);

9
res/shader/RenderDepthBuffer.fs
View File

@ -0,0 +1,9 @@
uniform sampler2D U_MainTexture;
varying vec2 V_Texcoord;
void main()
{
float depthValue=pow(texture2D(U_MainTexture,V_Texcoord).r,8.0);
gl_FragColor=vec4(vec3(depthValue),1.0);
}

1
shader2.vcxproj
View File

@ -159,6 +159,7 @@
<ClInclude Include="timer.h" />
</ItemGroup>
<ItemGroup>
<None Include="res\shader\RenderDepthBuffer.fs" />
<None Include="res\shader\SimpleTexture.fs" />
<None Include="res\shader\SimpleTexture.vs" />
<None Include="res\shader\UI FullScreemQuad.vs" />

3
shader2.vcxproj.filters
View File

@ -55,5 +55,8 @@
<None Include="res\shader\UI FullScreemQuad.vs">
<Filter>源文件</Filter>
</None>
<None Include="res\shader\RenderDepthBuffer.fs">
<Filter>源文件</Filter>
</None>
</ItemGroup>
</Project>
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