feat(OpenGL): lab 3
This commit is contained in:
iridiumR
parent
588a89f9e2
commit
0f5bebbdad
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@ -2,6 +2,7 @@
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SRC_DIR := ./src
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#头文件目录
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INC_DIR := ./include
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INC_DIR += /usr/include/freetype2
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#输出文件目录
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OUT_DIR := ./build
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#目标文件（中间文件）目录
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@ -9,6 +10,7 @@ OBJ_DIR :=./build
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#链接选项
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LDFLAGS := $(shell pkg-config --static --libs glfw3)
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LDFLAGS += $(shell pkg-config --static --libs assimp)
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LDFLAGS += $(shell pkg-config --static -libs freetype2)
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# 调试符号
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LDFLAGS += -g
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#编译工具链
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@ -28,6 +28,11 @@ unsigned int TextureFromFile(const char *path, const string &directory, bool gam
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class Model
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{
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public:
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unsigned long vertexCount = 0;
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unsigned long triangleCount = 0;
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unsigned long textureCount = 0;
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// model data
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vector<Texture> textures_loaded; // stores all the textures loaded so far, optimization to make sure textures aren't loaded more than once.
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vector<Mesh> meshes;
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@ -60,6 +65,12 @@ private:
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cout << "ERROR::ASSIMP:: " << importer.GetErrorString() << endl;
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return;
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}
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for(unsigned int i = 0; i < scene->mNumMaterials; i++){
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const aiMaterial* material = scene->mMaterials[i];
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textureCount += material->GetTextureCount(aiTextureType_DIFFUSE);
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}
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// retrieve the directory path of the filepath
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directory = path.substr(0, path.find_last_of('/'));
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@ -76,6 +87,10 @@ private:
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// the node object only contains indices to index the actual objects in the scene.
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// the scene contains all the data, node is just to keep stuff organized (like relations between nodes).
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aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
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vertexCount += mesh->mNumVertices;
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triangleCount += mesh->mNumFaces;
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meshes.push_back(processMesh(mesh, scene));
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}
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// after we've processed all of the meshes (if any) we then recursively process each of the children nodes
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@ -10,57 +10,8 @@
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#include <iostream>
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#include <filesystem>
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#include "model.h"
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float vertices[] = {
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f
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};
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glm::vec3 cubePositions[] = {
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glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(2.0f, 5.0f, -15.0f),
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glm::vec3(-1.5f, -2.2f, -2.5f), glm::vec3(-3.8f, -2.0f, -12.3f),
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glm::vec3(2.4f, -0.4f, -3.5f), glm::vec3(-1.7f, 3.0f, -7.5f),
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glm::vec3(1.3f, -2.0f, -2.5f), glm::vec3(1.5f, 2.0f, -2.5f),
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glm::vec3(1.5f, 0.2f, -1.5f), glm::vec3(-1.3f, 1.0f, -1.5f)};
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#include <ft2build.h>
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#include FT_FREETYPE_H
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float deltaTime = 0.0f; // 当前帧与上一帧的时间差
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float lastFrame = 0.0f; // 上一帧的时间
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@ -68,7 +19,6 @@ float lastFrame = 0.0f; // 上一帧的时间
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// settings
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const unsigned int SCR_WIDTH = 800;
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const unsigned int SCR_HEIGHT = 800;
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glm::vec3 lightPos(1.2f, 1.0f, 2.0f);
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// 创建摄像机
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Camera camera = Camera(SCR_HEIGHT / 2.0f, SCR_HEIGHT / 2.0f);
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@ -1,32 +0,0 @@
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#version 330 core
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out vec4 FragColor;
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in vec3 Normal;
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in vec3 FragPos;
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uniform vec3 lightPos;
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uniform vec3 lightColor;
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uniform vec3 objectColor;
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uniform vec3 viewPos;
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void main() {
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// 环境
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float ambientStrength = 0.1;
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vec3 ambient = ambientStrength * lightColor;
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// 漫反射
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vec3 norm = normalize(Normal);
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vec3 lightDir = normalize(lightPos - FragPos);
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float diff = max(dot(norm, lightDir), 0.0);
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vec3 diffuse = diff * lightColor;
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// 镜面
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float specularStrength = 0.5;
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vec3 viewDir = normalize(viewPos - FragPos);
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vec3 reflectDir = reflect(-lightDir, norm);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), 64);
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vec3 specular = specularStrength * spec * lightColor;
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vec3 result = (ambient + diffuse + specular) * objectColor;
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FragColor = vec4(result, 1.0);
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}
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@ -1,18 +0,0 @@
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#version 330 core
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layout (location = 0) in vec3 aPos;
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layout (location = 1) in vec3 aNormal;
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out vec3 FragPos;
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out vec3 Normal;
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uniform mat4 model;
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uniform mat4 view;
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uniform mat4 projection;
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void main()
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{
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FragPos = vec3(model * vec4(aPos, 1.0));
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Normal = aNormal;
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gl_Position = projection * view * vec4(FragPos, 1.0);
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}
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@ -1,7 +0,0 @@
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#version 330 core
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out vec4 FragColor;
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void main()
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{
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FragColor = vec4(1.0); // set all 4 vector values to 1.0
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}
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@ -1,11 +0,0 @@
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#version 330 core
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layout (location = 0) in vec3 aPos;
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uniform mat4 model;
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uniform mat4 view;
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uniform mat4 projection;
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void main()
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{
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gl_Position = projection * view * model * vec4(aPos, 1.0);
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}
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@ -8,6 +8,18 @@ void processInput(GLFWwindow *window);
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void mouse_callback(GLFWwindow *window, double xpos, double ypos);
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void scroll_callback(GLFWwindow *window, double xoffset, double yoffset);
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struct Character {
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GLuint TextureID; // 字形纹理的ID
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glm::ivec2 Size; // 字形大小
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glm::ivec2 Bearing; // 从基准线到字形左部/顶部的偏移值
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GLuint Advance; // 原点距下一个字形原点的距离
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};
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std::map<GLchar, Character> Characters;
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GLuint VAO, VBO;
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void RenderText(Shader &shader, std::string text, GLfloat x, GLfloat y,
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GLfloat scale, glm::vec3 color);
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int main() {
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// 设置 glfw
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@ -39,11 +51,77 @@ int main() {
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glfwSetCursorPosCallback(window, mouse_callback);
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glfwSetScrollCallback(window, scroll_callback);
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// 反转y轴
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// stbi_set_flip_vertically_on_load(true);
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// FreeType
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FT_Library ft;
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// All functions return a value different than 0 whenever an error occurred
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if (FT_Init_FreeType(&ft))
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std::cout << "ERROR::FREETYPE: Could not init FreeType Library"
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<< std::endl;
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// Load font as face
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FT_Face face;
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if (FT_New_Face(ft, "/usr/share/fonts/TTF/Hack-Regular.ttf", 0, &face))
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std::cout << "ERROR::FREETYPE: Failed to load font" << std::endl;
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// Set size to load glyphs as
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FT_Set_Pixel_Sizes(face, 0, 48);
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// Disable byte-alignment restriction
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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// Load first 128 characters of ASCII set
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for (GLubyte c = 0; c < 128; c++) {
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// Load character glyph
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if (FT_Load_Char(face, c, FT_LOAD_RENDER)) {
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std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
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continue;
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}
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// Generate texture
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GLuint texture;
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glGenTextures(1, &texture);
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glBindTexture(GL_TEXTURE_2D, texture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, face->glyph->bitmap.width,
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face->glyph->bitmap.rows, 0, GL_RED, GL_UNSIGNED_BYTE,
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face->glyph->bitmap.buffer);
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// Set texture options
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// Now store character for later use
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Character character = {
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texture,
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glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
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glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
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face->glyph->advance.x};
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Characters.insert(std::pair<GLchar, Character>(c, character));
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}
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glBindTexture(GL_TEXTURE_2D, 0);
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// Destroy FreeType once we're finished
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FT_Done_Face(face);
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FT_Done_FreeType(ft);
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// Configure VAO/VBO for texture quads
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glGenVertexArrays(1, &VAO);
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glGenBuffers(1, &VBO);
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glBindVertexArray(VAO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 6 * 4, NULL, GL_DYNAMIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), 0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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// 加载着色器
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Shader ourShader("src/model.vs", "src/model.fs");
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// Compile and setup the shader
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Shader shader("src/text.vs", "src/text.fs");
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glm::mat4 projection = glm::ortho(0.0f, static_cast<GLfloat>(SCR_WIDTH), 0.0f,
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static_cast<GLfloat>(SCR_HEIGHT));
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shader.use();
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shader.setMat4("projection", projection);
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// 加载模型
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Model Model1("resources/models/nanosuit/nanosuit.obj");
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// Model ourModel("resources/models/bugatti/bugatti.obj");
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@ -75,6 +153,23 @@ int main() {
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glClearColor(0.8f, 0.8f, 0.8f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// 绘制文字
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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RenderText(shader, std::to_string(1.0f / deltaTime), float(SCR_WIDTH - 150),
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float(SCR_HEIGHT - 50), 0.5f, glm::vec3(0.0, 0.0f, 0.0f));
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std::string info =
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"Vertex Count: " + std::to_string(ourModel->vertexCount) +
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" Triangle Count:" + std::to_string(ourModel->vertexCount / 3) +
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" Texture Count: " + std::to_string(ourModel->textureCount);
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RenderText(shader, info, float(5), float(25), 0.3f,
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glm::vec3(0.0, 0.0f, 0.0f));
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// 关闭混合
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glDisable(GL_BLEND);
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if (mode)
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// 线框模式
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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@ -96,7 +191,8 @@ int main() {
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glm::mat4 model = glm::mat4(1.0f);
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model = glm::translate(model, glm::vec3(0.0f, 0.0f, 0.0f));
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model = glm::scale(model, glm::vec3(1.0f, 1.0f, 1.0f));
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model = glm::rotate(model, glm::radians(float(10*glfwGetTime())), glm::vec3(0.0f, 1.0f, 0.0f));
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model = glm::rotate(model, glm::radians(float(10 * glfwGetTime())),
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glm::vec3(0.0f, 1.0f, 0.0f));
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ourShader.setMat4("model", model);
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ourModel->Draw(ourShader);
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@ -143,4 +239,49 @@ void mouse_callback(GLFWwindow *window, double xpos, double ypos) {
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void scroll_callback(GLFWwindow *window, double xoffset, double yoffset) {
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camera.ProcessMouseScroll(yoffset);
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}
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void RenderText(Shader &shader, std::string text, GLfloat x, GLfloat y,
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GLfloat scale, glm::vec3 color) {
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// Activate corresponding render state
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shader.use();
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shader.setVec3("textColor", color);
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glActiveTexture(GL_TEXTURE0);
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glBindVertexArray(VAO);
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// Iterate through all characters
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std::string::const_iterator c;
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for (c = text.begin(); c != text.end(); c++) {
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Character ch = Characters[*c];
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GLfloat xpos = x + ch.Bearing.x * scale;
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GLfloat ypos = y - (ch.Size.y - ch.Bearing.y) * scale;
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GLfloat w = ch.Size.x * scale;
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GLfloat h = ch.Size.y * scale;
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// Update VBO for each character
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GLfloat vertices[6][4] = {
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{xpos, ypos + h, 0.0, 0.0}, {xpos, ypos, 0.0, 1.0},
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{xpos + w, ypos, 1.0, 1.0},
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{xpos, ypos + h, 0.0, 0.0}, {xpos + w, ypos, 1.0, 1.0},
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{xpos + w, ypos + h, 1.0, 0.0}};
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// Render glyph texture over quad
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glBindTexture(GL_TEXTURE_2D, ch.TextureID);
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// Update content of VBO memory
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferSubData(
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GL_ARRAY_BUFFER, 0, sizeof(vertices),
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vertices); // Be sure to use glBufferSubData and not glBufferData
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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// Render quad
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glDrawArrays(GL_TRIANGLES, 0, 6);
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// Now advance cursors for next glyph (note that advance is number of 1/64
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// pixels)
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x += (ch.Advance >> 6) *
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scale; // Bitshift by 6 to get value in pixels (2^6 = 64 (divide amount
|
||||
// of 1/64th pixels by 64 to get amount of pixels))
|
||||
}
|
||||
glBindVertexArray(0);
|
||||
glBindTexture(GL_TEXTURE_2D, 0);
|
||||
}
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
#version 330 core
|
||||
layout(location = 0) in vec3 aPos; // 位置变量的属性位置值为0
|
||||
uniform float xOffset;
|
||||
uniform float yOffset;
|
||||
void main() {
|
||||
gl_Position = vec4(aPos.x + xOffset, aPos.y + yOffset, aPos.z,
|
||||
1.0); // 注意我们如何把一个vec3作为vec4的构造器的参数
|
||||
}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
#version 330 core
|
||||
in vec2 TexCoords;
|
||||
out vec4 color;
|
||||
|
||||
uniform sampler2D text;
|
||||
uniform vec3 textColor;
|
||||
|
||||
void main()
|
||||
{
|
||||
vec4 sampled = vec4(1.0, 1.0, 1.0, texture(text, TexCoords).r);
|
||||
color = vec4(textColor, 1.0) * sampled;
|
||||
}
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
#version 330 core
|
||||
layout (location = 0) in vec4 vertex; // <vec2 pos, vec2 tex>
|
||||
out vec2 TexCoords;
|
||||
|
||||
uniform mat4 projection;
|
||||
|
||||
void main()
|
||||
{
|
||||
gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);
|
||||
TexCoords = vertex.zw;
|
||||
}
|
||||
|
|
@ -1,9 +0,0 @@
|
|||
#version 330 core
|
||||
out vec4 FragColor;
|
||||
|
||||
uniform vec4 ourColor; // 在OpenGL程序代码中设定这个变量
|
||||
|
||||
void main()
|
||||
{
|
||||
FragColor = ourColor;
|
||||
}
|
||||
Reference in New Issue