基于Qt的OpenGL编程（3.x以上GLSL可编程管线版）---(十二)光照贴图

其他 2018-08-19 16:43:56 阅读次数: 0

（Vries的原教程地址如下，https://learnopengl-cn.github.io/02%20Lighting/04%20Lighting%20maps/ 关于OpenGL函数的详细解析及OpenGL关于满反射贴图与镜面反射贴图的知识点详情描述请看这个教程，本篇旨在对Vires基于visual studio的编程思想做Qt平台的移植，重在记录自身学习之用）


Qt开发平台：5.8.0

编译器：Desktop Qt 5.8.0 MSVC2015_64bit


一，漫反射贴图

其实就是应用纹理，将纹理放进shader着色器中，用光照效果渲染。




项目组织如下：


cube.vert

#version 330 core
layout (location = 0) in vec3 aPos;
layout (location = 1) in vec3 aNormal;
layout (location = 2) in vec2 aTexCoords;

uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;

out vec3 Normal;
out vec3 FragPos;
out vec2 TexCoords;

void main(){
  gl_Position = projection * view * model * vec4(aPos, 1.0f);
  Normal = mat3(transpose(inverse(model))) * aNormal;//预防scale对法线的干扰
  FragPos = vec3(model * vec4(aPos, 1.0f));
  TexCoords = aTexCoords;
}

cube.frag

#version 330 core
struct Material{
  sampler2D diffuse;
  vec3 specular;
  float shininess;
};

struct Light{
  vec3 position;

  vec3 ambient;
  vec3 diffuse;
  vec3 specular;
};

out vec4 FragColor;
in vec2 TexCoords;

uniform Material material;
uniform Light light;

uniform vec3 viewPos;

in vec3 Normal;
in vec3 FragPos;

void main()
{
  //ambient
  vec3 ambient = light.ambient * vec3(texture2D(material.diffuse, TexCoords));

  //diffuse
  vec3 norm = normalize(Normal);
  vec3 lightDir = normalize(light.position - FragPos);
  float diff = max(dot(norm, lightDir), 0.0f);
  vec3 diffuse = light.diffuse * (diff * vec3(texture2D(material.diffuse, TexCoords)));

  //specular
  vec3 viewDir = normalize(viewPos - FragPos);
  vec3 reflectDir = reflect(-lightDir, norm);
  float spec = pow(max(dot(viewDir, reflectDir), 0.0f), material.shininess);
  vec3 specular = light.specular * (spec * material.specular);

  //all
  vec3 result =  ambient + diffuse + specular;
  FragColor = vec4(result, 1.0f);

}

cube.h

#ifndef CUBE_H
#define CUBE_H

#include <QOpenGLFunctions_3_3_Core>

class Cube
{
public:
  Cube();
  ~Cube();
  void init();
  void drawLight();
  void drawCube();
private:
  QOpenGLFunctions_3_3_Core *core;
  GLuint VBO, cubeVAO, lightVAO;
};

#endif // CUBE_H

cube.cpp

#include "cube.h"
#include "resourcemanager.h"

Cube::Cube(){

}

Cube::~Cube(){
  core->glDeleteVertexArrays(1, &cubeVAO);
  core->glDeleteVertexArrays(1, &lightVAO);
}

void Cube::init(){
  core = QOpenGLContext::currentContext()->versionFunctions<QOpenGLFunctions_3_3_Core>();
  float vertices[] = {
      // positions          // normals           // texture coords
      -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  0.0f, 0.0f,
       0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  1.0f, 0.0f,
       0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  1.0f, 1.0f,
       0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  1.0f, 1.0f,
      -0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  0.0f, 1.0f,
      -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  0.0f, 0.0f,

      -0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   0.0f, 0.0f,
       0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   1.0f, 0.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   1.0f, 1.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   1.0f, 1.0f,
      -0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   0.0f, 1.0f,
      -0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   0.0f, 0.0f,

      -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,  1.0f, 0.0f,
      -0.5f,  0.5f, -0.5f, -1.0f,  0.0f,  0.0f,  1.0f, 1.0f,
      -0.5f, -0.5f, -0.5f, -1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
      -0.5f, -0.5f, -0.5f, -1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
      -0.5f, -0.5f,  0.5f, -1.0f,  0.0f,  0.0f,  0.0f, 0.0f,
      -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,  1.0f, 0.0f,

       0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,  1.0f, 0.0f,
       0.5f,  0.5f, -0.5f,  1.0f,  0.0f,  0.0f,  1.0f, 1.0f,
       0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
       0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
       0.5f, -0.5f,  0.5f,  1.0f,  0.0f,  0.0f,  0.0f, 0.0f,
       0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,  1.0f, 0.0f,

      -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,  0.0f, 1.0f,
       0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,  1.0f, 1.0f,
       0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,  1.0f, 0.0f,
       0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,  1.0f, 0.0f,
      -0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,  0.0f, 0.0f,
      -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,  0.0f, 1.0f,

      -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 1.0f,
       0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  1.0f, 1.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  1.0f, 0.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  1.0f, 0.0f,
      -0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 0.0f,
      -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 1.0f
  };

  core->glGenVertexArrays(1, &cubeVAO);//两个参数，第一个为需要创建的缓存数量。第二个为用于存储单一ID或多个ID的GLuint变量或数组的地址
  core->glGenVertexArrays(1, &lightVAO);
  core->glGenBuffers(1, &VBO);

  core->glBindBuffer(GL_ARRAY_BUFFER, VBO);
  core->glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

  core->glBindVertexArray(cubeVAO);
    core->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
    core->glEnableVertexAttribArray(0);
    core->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3*sizeof(float)));
    core->glEnableVertexAttribArray(1);
    core->glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6*sizeof(float)));
    core->glEnableVertexAttribArray(2);
  core->glBindVertexArray(0);

  core->glBindVertexArray(lightVAO);
    core->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
    core->glEnableVertexAttribArray(0);
  core->glBindVertexArray(0);

  core->glDeleteBuffers(1, &VBO);

  ResourceManager::loadTexture("container2", ":/textures/res/textures/container2.png");
}

void Cube::drawCube(){
  core->glActiveTexture(GL_TEXTURE0);
  ResourceManager::getTexture("container2").bind();

  core->glBindVertexArray(cubeVAO);
  core->glDrawArrays(GL_TRIANGLES, 0, 36);
}

void Cube::drawLight(){
    core->glBindVertexArray(lightVAO);
    core->glDrawArrays(GL_TRIANGLES, 0, 36);
}

oglmanager.h

#ifndef OGLMANAGER_H
#define OGLMANAGER_H

#include <QOpenGLFunctions_3_3_Core>
#include "camera.h"
#include "shader.h"
#include <QOpenGLTexture>
#include "texture2d.h"

class OGLManager
{
public:
    OGLManager(GLuint w, GLuint h);
    ~OGLManager();

    void init();
    void processInput(GLfloat dt);
    void update(GLfloat dt);
    void resize(GLuint w, GLuint h);
    void draw(GLfloat dt);


    GLboolean keys[1024];
    Camera *camera;
private:
    QOpenGLFunctions_3_3_Core *core;
    GLuint width;
    GLuint height;


};

#endif // OGLMANAGER_H

oglmanager.cpp

#include "oglmanager.h"
#include <QKeyEvent>
#include <QDebug>
#include "resourcemanager.h"
#include "cube.h"

const QVector3D CAMERA_POSITION(0.0f, 0.0f, 3.0f);
const QVector3D LIGHT_POSITION(1.0f, 0.8f, 0.8f);

Cube *cube;

OGLManager::OGLManager(GLuint w, GLuint h){
  this->width = w;
  this->height = h;
  for(GLuint i = 0; i != 1024; ++i)
    keys[i] = GL_FALSE;

}

OGLManager::~OGLManager(){
  delete this->camera;
  ResourceManager::clear();
}

void OGLManager::init(){
  cube = new Cube();

  this->camera = new Camera(CAMERA_POSITION);
  cube->init();
  core = QOpenGLContext::currentContext()->versionFunctions<QOpenGLFunctions_3_3_Core>();

  ResourceManager::loadShader("cube", ":/shaders/res/shaders/cube.vert", ":/shaders/res/shaders/cube.frag");
  ResourceManager::loadShader("light", ":/shaders/res/shaders/light.vert", ":/shaders/res/shaders/light.frag");


//  ResourceManager::getShader("cube").use().setVector3f("material.ambient", QVector3D(1.0f, 0.5f, 0.31f));
//  ResourceManager::getShader("cube").use().setVector3f("material.diffuse", QVector3D(1.0f, 0.5f, 0.31f));
  ResourceManager::getShader("cube").use().setInteger("material.diffuse", 0);
  ResourceManager::getShader("cube").use().setVector3f("material.specular", QVector3D(0.5f, 0.5f, 0.5f));
  ResourceManager::getShader("cube").use().setFloat("material.shininess", 64.0f);

  ResourceManager::getShader("cube").use().setVector3f("light.ambient", QVector3D(0.2f, 0.2f, 0.2f));
  ResourceManager::getShader("cube").use().setVector3f("light.diffuse", QVector3D(0.5f, 0.5f, 0.5f));
  ResourceManager::getShader("cube").use().setVector3f("light.specular", QVector3D(1.0f, 1.0f, 1.0f));
  ResourceManager::getShader("cube").use().setVector3f("light.position", LIGHT_POSITION);


  //开启状态
  core->glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
  core->glEnable(GL_DEPTH_TEST);
}

void OGLManager::processInput(GLfloat dt){
  if (keys[Qt::Key_W])
    camera->processKeyboard(FORWARD, dt);
  if (keys[Qt::Key_S])
    camera->processKeyboard(BACKWARD, dt);
  if (keys[Qt::Key_A])
    camera->processKeyboard(LEFT, dt);
  if (keys[Qt::Key_D])
    camera->processKeyboard(RIGHT, dt);
  if (keys[Qt::Key_E])
    camera->processKeyboard(UP, dt);
  if (keys[Qt::Key_Q])
    camera->processKeyboard(DOWN, dt);
}

//GLfloat time = 0.0f;

void OGLManager::update(GLfloat dt){
  QMatrix4x4 projection, model;
  projection.perspective(camera->zoom, (GLfloat)width/(GLfloat)height, 0.1f, 200.f);

  ResourceManager::getShader("cube").use().setMatrix4f("projection", projection);
  ResourceManager::getShader("cube").use().setMatrix4f("view", camera->getViewMatrix());
  ResourceManager::getShader("cube").use().setMatrix4f("model", model);
  ResourceManager::getShader("cube").use().setVector3f("viewPos", camera->position);

  model.translate(LIGHT_POSITION);
  model.scale(0.2f);
  ResourceManager::getShader("light").use().setMatrix4f("projection", projection);
  ResourceManager::getShader("light").use().setMatrix4f("view", camera->getViewMatrix());
  ResourceManager::getShader("light").use().setMatrix4f("model", model);

//  QVector3D lightColor, ambientColor, diffuseColor;
////  time += dt * 0.08f;
////  lightColor.setX(sin(time * 2.0f));
////  lightColor.setY(sin(time * 0.7f));
////  lightColor.setZ(sin(time * 1.3f));

////  diffuseColor = lightColor * 0.5f;
////  ambientColor = diffuseColor * 0.3f;

//  ResourceManager::getShader("cube").use().setVector3f("light.ambient", ambientColor);
//  ResourceManager::getShader("cube").use().setVector3f("light.diffuse", diffuseColor);
}

void OGLManager::resize(GLuint w, GLuint h){
  core->glViewport(0, 0, w, h);
}

void OGLManager::draw(GLfloat dt)
{
  core->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  ResourceManager::getShader("cube").use();
  cube->drawCube();

  ResourceManager::getShader("light").use();
  cube->drawLight();
}

二，镜面反射贴图

箱子纹理的木头材质按理说是不会反光的，上面的效果图看起来就不是很自然。所以为解决这个问题，仿照漫反射贴图，设置镜面反射贴图。

效果如下，左为镜面反射贴图，右为程序效果。



修改cube.frag，略微修改cube.cpp与oglmanager.cpp

cube.frag

#version 330 core
struct Material{
//		vec3 ambient;
//		vec3 diffuse;
//		vec3 specular;
  sampler2D diffuse;
  sampler2D specular;
  float shininess;
};

struct Light{
  vec3 position;

  vec3 ambient;
  vec3 diffuse;
  vec3 specular;
};

out vec4 FragColor;
in vec2 TexCoords;

uniform Material material;
uniform Light light;

uniform vec3 viewPos;

in vec3 Normal;
in vec3 FragPos;

void main()
{
		//ambient
  vec3 ambient = light.ambient * vec3(texture2D(material.diffuse, TexCoords));

		//diffuse
  vec3 norm = normalize(Normal);
  vec3 lightDir = normalize(light.position - FragPos);
  float diff = max(dot(norm, lightDir), 0.0f);
  vec3 diffuse = light.diffuse * (diff * vec3(texture2D(material.diffuse, TexCoords)));

		//specular
  vec3 viewDir = normalize(viewPos - FragPos);
  vec3 reflectDir = reflect(-lightDir, norm);
  float spec = pow(max(dot(viewDir, reflectDir), 0.0f), material.shininess);
  vec3 specular = light.specular * (spec * vec3(texture2D(material.specular, TexCoords)));

		//all
  vec3 result =  ambient + diffuse + specular;
  FragColor = vec4(result, 1.0f);

}

cube.cpp

#include "cube.h"
#include "resourcemanager.h"

Cube::Cube(){

}

Cube::~Cube(){
  core->glDeleteVertexArrays(1, &cubeVAO);
  core->glDeleteVertexArrays(1, &lightVAO);
}

void Cube::init(){
  core = QOpenGLContext::currentContext()->versionFunctions<QOpenGLFunctions_3_3_Core>();
  float vertices[] = {
      // positions          // normals           // texture coords
      -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  0.0f, 0.0f,
       0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  1.0f, 0.0f,
       0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  1.0f, 1.0f,
       0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  1.0f, 1.0f,
      -0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  0.0f, 1.0f,
      -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,  0.0f, 0.0f,

      -0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   0.0f, 0.0f,
       0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   1.0f, 0.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   1.0f, 1.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   1.0f, 1.0f,
      -0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   0.0f, 1.0f,
      -0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,   0.0f, 0.0f,

      -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,  1.0f, 0.0f,
      -0.5f,  0.5f, -0.5f, -1.0f,  0.0f,  0.0f,  1.0f, 1.0f,
      -0.5f, -0.5f, -0.5f, -1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
      -0.5f, -0.5f, -0.5f, -1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
      -0.5f, -0.5f,  0.5f, -1.0f,  0.0f,  0.0f,  0.0f, 0.0f,
      -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,  1.0f, 0.0f,

       0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,  1.0f, 0.0f,
       0.5f,  0.5f, -0.5f,  1.0f,  0.0f,  0.0f,  1.0f, 1.0f,
       0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
       0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,  0.0f, 1.0f,
       0.5f, -0.5f,  0.5f,  1.0f,  0.0f,  0.0f,  0.0f, 0.0f,
       0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,  1.0f, 0.0f,

      -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,  0.0f, 1.0f,
       0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,  1.0f, 1.0f,
       0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,  1.0f, 0.0f,
       0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,  1.0f, 0.0f,
      -0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,  0.0f, 0.0f,
      -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,  0.0f, 1.0f,

      -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 1.0f,
       0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  1.0f, 1.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  1.0f, 0.0f,
       0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  1.0f, 0.0f,
      -0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 0.0f,
      -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 1.0f
  };

  core->glGenVertexArrays(1, &cubeVAO);//两个参数，第一个为需要创建的缓存数量。第二个为用于存储单一ID或多个ID的GLuint变量或数组的地址
  core->glGenVertexArrays(1, &lightVAO);
  core->glGenBuffers(1, &VBO);

  core->glBindBuffer(GL_ARRAY_BUFFER, VBO);
  core->glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

  core->glBindVertexArray(cubeVAO);
    core->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
    core->glEnableVertexAttribArray(0);
    core->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3*sizeof(float)));
    core->glEnableVertexAttribArray(1);
    core->glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6*sizeof(float)));
    core->glEnableVertexAttribArray(2);
  core->glBindVertexArray(0);

  core->glBindVertexArray(lightVAO);
    core->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
    core->glEnableVertexAttribArray(0);
  core->glBindVertexArray(0);

  core->glDeleteBuffers(1, &VBO);

  ResourceManager::loadTexture("container2", ":/textures/res/textures/container2.png");
//  ResourceManager::loadTexture("container2_specular", ":/textures/res/textures/container2_specular.png");
  ResourceManager::loadTexture("container2_specular", ":/textures/res/textures/matrix.jpg");

}

void Cube::drawCube(){
  core->glActiveTexture(GL_TEXTURE0);
  ResourceManager::getTexture("container2").bind();
  core->glActiveTexture(GL_TEXTURE1);
  ResourceManager::getTexture("container2_specular").bind();


  core->glBindVertexArray(cubeVAO);
  core->glDrawArrays(GL_TRIANGLES, 0, 36);
}

void Cube::drawLight(){
  core->glBindVertexArray(lightVAO);
  core->glDrawArrays(GL_TRIANGLES, 0, 36);
}

oglmanager.cpp

#include "oglmanager.h"
#include <QKeyEvent>
#include <QDebug>
#include "resourcemanager.h"
#include "cube.h"

const QVector3D CAMERA_POSITION(0.0f, 0.0f, 3.0f);
const QVector3D LIGHT_POSITION(1.0f, 0.8f, 0.8f);

Cube *cube;

OGLManager::OGLManager(GLuint w, GLuint h){
  this->width = w;
  this->height = h;
  for(GLuint i = 0; i != 1024; ++i)
    keys[i] = GL_FALSE;

}

OGLManager::~OGLManager(){
  delete this->camera;
  ResourceManager::clear();
}

void OGLManager::init(){
  cube = new Cube();

  this->camera = new Camera(CAMERA_POSITION);
  cube->init();
  core = QOpenGLContext::currentContext()->versionFunctions<QOpenGLFunctions_3_3_Core>();

  ResourceManager::loadShader("cube", ":/shaders/res/shaders/cube.vert", ":/shaders/res/shaders/cube.frag");
  ResourceManager::loadShader("light", ":/shaders/res/shaders/light.vert", ":/shaders/res/shaders/light.frag");


//  ResourceManager::getShader("cube").use().setVector3f("material.ambient", QVector3D(1.0f, 0.5f, 0.31f));
//  ResourceManager::getShader("cube").use().setVector3f("material.diffuse", QVector3D(1.0f, 0.5f, 0.31f));
//  ResourceManager::getShader("cube").use().setVector3f("material.specular", QVector3D(0.5f, 0.5f, 0.5f));
  ResourceManager::getShader("cube").use().setInteger("material.diffuse", 0);
  ResourceManager::getShader("cube").use().setInteger("material.specular", 1);
  ResourceManager::getShader("cube").use().setFloat("material.shininess", 64.0f);

  ResourceManager::getShader("cube").use().setVector3f("light.ambient", QVector3D(0.2f, 0.2f, 0.2f));
  ResourceManager::getShader("cube").use().setVector3f("light.diffuse", QVector3D(0.5f, 0.5f, 0.5f));
  ResourceManager::getShader("cube").use().setVector3f("light.specular", QVector3D(1.0f, 1.0f, 1.0f));
  ResourceManager::getShader("cube").use().setVector3f("light.position", LIGHT_POSITION);


  //开启状态
  core->glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
  core->glEnable(GL_DEPTH_TEST);
}

void OGLManager::processInput(GLfloat dt){
  if (keys[Qt::Key_W])
    camera->processKeyboard(FORWARD, dt);
  if (keys[Qt::Key_S])
    camera->processKeyboard(BACKWARD, dt);
  if (keys[Qt::Key_A])
    camera->processKeyboard(LEFT, dt);
  if (keys[Qt::Key_D])
    camera->processKeyboard(RIGHT, dt);
  if (keys[Qt::Key_E])
    camera->processKeyboard(UP, dt);
  if (keys[Qt::Key_Q])
    camera->processKeyboard(DOWN, dt);
}

//GLfloat time = 0.0f;

void OGLManager::update(GLfloat dt){
  QMatrix4x4 projection, model;
  projection.perspective(camera->zoom, (GLfloat)width/(GLfloat)height, 0.1f, 200.f);

  ResourceManager::getShader("cube").use().setMatrix4f("projection", projection);
  ResourceManager::getShader("cube").use().setMatrix4f("view", camera->getViewMatrix());
  ResourceManager::getShader("cube").use().setMatrix4f("model", model);
  ResourceManager::getShader("cube").use().setVector3f("viewPos", camera->position);

  model.translate(LIGHT_POSITION);
  model.scale(0.2f);
  ResourceManager::getShader("light").use().setMatrix4f("projection", projection);
  ResourceManager::getShader("light").use().setMatrix4f("view", camera->getViewMatrix());
  ResourceManager::getShader("light").use().setMatrix4f("model", model);

//  QVector3D lightColor, ambientColor, diffuseColor;
////  time += dt * 0.08f;
////  lightColor.setX(sin(time * 2.0f));
////  lightColor.setY(sin(time * 0.7f));
////  lightColor.setZ(sin(time * 1.3f));

////  diffuseColor = lightColor * 0.5f;
////  ambientColor = diffuseColor * 0.3f;

//  ResourceManager::getShader("cube").use().setVector3f("light.ambient", ambientColor);
//  ResourceManager::getShader("cube").use().setVector3f("light.diffuse", diffuseColor);
}

void OGLManager::resize(GLuint w, GLuint h){
  core->glViewport(0, 0, w, h);
}

void OGLManager::draw(GLfloat dt)
{
  core->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  ResourceManager::getShader("cube").use();
  cube->drawCube();

  ResourceManager::getShader("light").use();
  cube->drawLight();
}

猜你喜欢

转载自blog.csdn.net/z136411501/article/details/80149125
今日推荐
TIOBE 5 月榜单：Fortran “复活”进入 Top 10
GCC 14.1 发布
面壁智能发布 Eurux-8x22B 开源大模型 —— 堪称「理科状元」
开源日报 | 谷歌扶持鸿蒙上位；开源Rabbit R1；Docker加持的安卓手机；微软的焦虑和野心；海尔电器把开放平台关了
中国码农的“35岁魔咒”
蘭雅 CorelDRAW 插件 2024.5.1 国际劳动节版，免费下载
Arc Browser for Windows 1.0 正式 GA
90后程序员开发视频搬运软件、不到一年获利超 700 万，结局很刑！
周排行
Java自定义时间格式
同步整形电路
在开发中最最最常用的字符串的属性大集合
Linux 查看端口占用并杀掉
Java基础四：ArrayList
多线程之死锁就是这么简单
mysql 基础命令集
awk 命令详解
Centos6.3编译安装nginx+php步骤
OCR （Optical Character Recognition，光学字符识别）
每日归档
更多
2024-05-08(42)
2024-05-07(14)
2024-05-06(40)
2024-05-05(0)
2024-05-04(7)
2024-05-03(19)
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022