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[Week8-2][Week8-3]实现旋转光源照射物体的效果
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@toulzx
toulzx committed Nov 15, 2021
1 parent 1f0d24d commit ebd1344
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Showing 9 changed files with 274 additions and 54 deletions.
5 changes: 5 additions & 0 deletions Source/HelloCG/Camera.h
View file
Expand Up @@ -98,6 +98,11 @@ class Camera
return this->zoom;
}

glm::vec3 GetPosition()
{
return this->cameraPosition;
}

void ProcessKeyboard(Camera_Movement direction, GLfloat deltaTime)
{
GLfloat velocity = this->movementSpeed * deltaTime;
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3 changes: 3 additions & 0 deletions Source/HelloCG/HelloCG.vcxproj
View file
Expand Up @@ -148,9 +148,12 @@
<None Include="glew32.dll" />
<None Include="res\shaders\core.fs" />
<None Include="res\shaders\core.vs" />
<None Include="res\shaders\light.fs" />
<None Include="res\shaders\light.vs" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="Camera.h" />
<ClInclude Include="Light.h" />
<ClInclude Include="Shader.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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9 changes: 9 additions & 0 deletions Source/HelloCG/HelloCG.vcxproj.filters
View file
Expand Up @@ -35,6 +35,12 @@
<None Include="res\shaders\core.vs">
<Filter>资源文件\res\shaders</Filter>
</None>
<None Include="res\shaders\light.fs">
<Filter>资源文件\res\shaders</Filter>
</None>
<None Include="res\shaders\light.vs">
<Filter>资源文件\res\shaders</Filter>
</None>
</ItemGroup>
<ItemGroup>
<ClInclude Include="Shader.h">
Expand All @@ -43,5 +49,8 @@
<ClInclude Include="Camera.h">
<Filter>头文件</Filter>
</ClInclude>
<ClInclude Include="Light.h">
<Filter>头文件</Filter>
</ClInclude>
</ItemGroup>
</Project>
95 changes: 95 additions & 0 deletions Source/HelloCG/Light.h
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@@ -0,0 +1,95 @@
#pragma once
#ifndef Light_h
#define Light_h

#include<GL/glew.h>
#include "Shader.h"


// 和 main.cpp 类似的立方体，现各面默认白色即可
GLfloat vertices[] =
{ // position

// z = -0.5 的矩形面
-0.5f, -0.5f, 0.5f,
0.5f, -0.5f, 0.5f,
0.5f, 0.5f, 0.5f,
0.5f, 0.5f, 0.5f,
-0.5f, 0.5f, 0.5f,
-0.5f, -0.5f, 0.5f,

// z = 0.5 的矩形面
-0.5f, -0.5f, -0.5f,
0.5f, -0.5f, -0.5f,
0.5f, 0.5f, -0.5f,
0.5f, 0.5f, -0.5f,
-0.5f, 0.5f, -0.5f,
-0.5f, -0.5f, -0.5f,

// x = -0.5 的矩形面
-0.5f, 0.5f, 0.5f,
-0.5f, 0.5f, -0.5f,
-0.5f, -0.5f, -0.5f,
-0.5f, -0.5f, -0.5f,
-0.5f, -0.5f, 0.5f,
-0.5f, 0.5f, 0.5f,

// x = 0.5 的矩形面
0.5f, 0.5f, 0.5f,
0.5f, 0.5f, -0.5f,
0.5f, -0.5f, -0.5f,
0.5f, -0.5f, -0.5f,
0.5f, -0.5f, 0.5f,
0.5f, 0.5f, 0.5f,

// y = -0.5 的矩形面
-0.5f, -0.5f, -0.5f,
0.5f, -0.5f, -0.5f,
0.5f, -0.5f, 0.5f,
0.5f, -0.5f, 0.5f,
-0.5f, -0.5f, 0.5f,
-0.5f, -0.5f, -0.5f,

// y = 0.5 的矩形面
-0.5f, 0.5f, -0.5f,
0.5f, 0.5f, -0.5f,
0.5f, 0.5f, 0.5f,
0.5f, 0.5f, 0.5f,
-0.5f, 0.5f, 0.5f,
-0.5f, 0.5f, -0.5f,
};

class Light
{
public:
Light()
{
this->update();
}
void Draw()
{
glBindVertexArray(this->VAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
}
private:
GLuint VAO, VBO;
void update()
{
glGenVertexArrays(1, &this->VAO);
glGenBuffers(1, &this->VBO);
// connect the VAO and VBO
glBindVertexArray(this->VAO);
glBindBuffer(GL_ARRAY_BUFFER, this->VBO);
// transfer the data
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// set the attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
};


#endif // !Light_h
149 changes: 96 additions & 53 deletions Source/HelloCG/main.cpp
View file
Expand Up @@ -8,9 +8,11 @@
#include <GLM/glm.hpp>
#include <GLM/gtc/matrix_transform.hpp>
#include <GLM/gtc/type_ptr.hpp>
#include <GLM/gtx/rotate_vector.hpp>

#include "Shader.h"
#include "Camera.h"
#include "Light.h"


// 窗口大小
Expand Down Expand Up @@ -39,6 +41,11 @@ bool firstMouse = true;
GLfloat lastX = WIDTH / 2.0f;
GLfloat lastY = HEIGHT / 2.0f;

// 漫反射参数
const GLfloat DIFFUSE = 0.8f;
// 镜面反射参数
const GLfloat SPECULAR = 0.6f;


int main()
{
Expand Down Expand Up @@ -69,7 +76,7 @@ int main()

// 在 GLFW 中注册响应
glfwSetKeyCallback(window, KeyCallback);
glfwSetCursorPosCallback(window, MouseCallback);
// glfwSetCursorPosCallback(window, MouseCallback); // 注释，方便展示效果
glfwSetScrollCallback(window, ScrollCallback);


Expand All @@ -93,63 +100,63 @@ int main()


Shader ourShader = Shader("res/shaders/core.vs", "res/shaders/core.fs");
Shader lightShader = Shader("res/shaders/light.vs", "res/shaders/light.fs");


// Week7-1 各面不同颜色的正方体
// 各面不同颜色的正方体 --- 第 1 个物体
GLfloat vertices[] =
{ // position // color

// z = -0.5 的矩形面 // 红色 (1, 0, 0)
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,

// z = 0.5 的矩形面 // 绿色 (0, 1, 0)
-0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
{ // position // color // normal vector

// z = -0.5 的矩形面 // 红色 (1, 0, 0)
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.1f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.1f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.1f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.1f,
-0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.1f,
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.1f,

// z = 0.5 的矩形面 // 绿色 (0, 1, 0)
-0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.1f,
0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.1f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.1f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.1f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.1f,
-0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.1f,

// x = -0.5 的矩形面 // 蓝色 (0, 0, 1)
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f,

// x = 0.5 的矩形面 // 黄色 (1, 1, 0)
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,

// y = -0.5 的矩形面 // 紫色 (1, 0, 1)
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,

// y = 0.5 的矩形面 // 青色 (0, 1, 1)
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f
};


// VAO、VBO 的创建、绑定、设置、解绑
// VAO、VBO 的创建、绑定、设置、解绑 --- 第 1 个物体
GLuint VAO, VBO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
Expand All @@ -159,36 +166,47 @@ int main()

glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 9 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 9 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 9 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);

glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);


// 各面不同颜色的正方体 --- 第 2 个物体
// VAO、VBO 的创建、绑定、设置、解绑 --- 第 2 个物体
Light lightModel = Light();

//设置光源的坐标
glm::vec3 lightPos = glm::vec3(0.0f, 1.5f, 0.0f);


// 逐帧画图
while (!glfwWindowShouldClose(window))
{
glViewport(0, 0, screenWidth, screenHeight);

// 响应 keyCallback 操作
glfwPollEvents();

// 使相机移动
DoMovement();

glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



/* 原立方体 */

ourShader.Use();


glm::mat4 transform = glm::mat4(1.0f);
transform = glm::translate(transform, glm::vec3(0.0f, 0.0f, -2.0f));
transform = glm::rotate(transform, glm::radians(20.0f) * static_cast<GLfloat>(glfwGetTime()), glm::vec3(1.0f, 1.0f, 1.0f));
transform = glm::scale(transform, glm::vec3(0.5f, 0.5f, 0.5f));
// transform = glm::translate(transform, glm::vec3(0.0f, 0.0f, -2.0f));
transform = glm::rotate(transform, glm::radians(20.0f), glm::vec3(1.0f, 1.0f, 1.0f));
// transform = glm::scale(transform, glm::vec3(0.5f, 0.5f, 0.5f));
glUniformMatrix4fv(glGetUniformLocation(ourShader.Program, "transform"), 1, GL_FALSE, glm::value_ptr(transform));

glm::mat4 projection = glm::perspective(glm::radians(camera.GetZoom()), float(screenWidth) / float(screenHeight), 0.1f, 100.0f);
Expand All @@ -197,11 +215,36 @@ int main()
glm::mat4 view = camera.GetViewMatrix();
glUniformMatrix4fv(glGetUniformLocation(ourShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));

glUniform3f(glGetUniformLocation(ourShader.Program, "LightPos"), lightPos.x, lightPos.y, lightPos.z);
glUniform3f(glGetUniformLocation(ourShader.Program, "ViewPos"), camera.GetPosition().x, camera.GetPosition().y, camera.GetPosition().z);
glUniform1f(glGetUniformLocation(ourShader.Program, "material.diffuse"), DIFFUSE);
glUniform1f(glGetUniformLocation(ourShader.Program, "material.specular"), SPECULAR);

glBindVertexArray(VAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);


/* 光源立方体 */

lightShader.Use();

glm::mat4 transformLight = glm::mat4(1.0f);
lightPos = glm::rotate(lightPos, glm::radians(0.05f), glm::vec3(1.0f, 1.0f, 1.0f));
transformLight = glm::translate(transformLight, lightPos);
transformLight = glm::scale(transformLight, glm::vec3(0.1f, 0.1f, 0.1f));
glUniformMatrix4fv(glGetUniformLocation(lightShader.Program, "transform"), 1, GL_FALSE, glm::value_ptr(transformLight));

glm::mat4 projectionLight = glm::perspective(glm::radians(camera.GetZoom()), float(screenWidth) / float(screenHeight), 0.1f, 100.0f);
glUniformMatrix4fv(glGetUniformLocation(lightShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projectionLight));

glm::mat4 viewLight = camera.GetViewMatrix();
glUniformMatrix4fv(glGetUniformLocation(lightShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(viewLight));

lightModel.Draw();


// 交换缓冲区（双缓冲机制）
glfwSwapBuffers(window);
}

Expand Down

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