feat(OpenGL): lab2
This commit is contained in:
iridiumR
parent
2b6518a20f
commit
186f5db772
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@ -0,0 +1,8 @@
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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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@ -0,0 +1,12 @@
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#version 330 core
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layout (location = 0) in vec3 aPos;
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uniform mat4 trans;
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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 * trans * vec4(aPos, 1.0);
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}
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@ -13,14 +13,13 @@
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const unsigned int SCR_WIDTH = 600;
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const unsigned int SCR_HEIGHT = 600;
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// 四边形顶点
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float vertices[] = {
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// ---- 位置 ---- ---- 颜色 ---- - 纹理坐标 -
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0.2f, 0.4f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // 右上
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0.2f, -0.4f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // 右下
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// ---- 位置 ---- -- 法向量-- - 纹理坐标 -
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0.2f, 0.4f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // 右上
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0.2f, -0.4f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, // 右下
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-0.2f, -0.4f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // 左下
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-0.2f, 0.4f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f // 左上
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-0.2f, 0.4f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f // 左上
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};
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// 索引
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@ -32,6 +31,9 @@ unsigned int indices[] = {
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float deltaTime, lastTime;
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Camera camera = Camera(SCR_HEIGHT / 2.0f, SCR_HEIGHT / 2.0f);
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// lighting
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glm::vec3 lightPos(1.2f, 1.0f, 2.0f);
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void framebuffer_size_callback(GLFWwindow *window, int width, int height);
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void processInput(GLFWwindow *window);
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void mouse_callback(GLFWwindow *window, double xpos, double ypos);
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@ -44,7 +46,6 @@ int main() {
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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// glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
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// 创建窗口
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GLFWwindow *window =
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@ -54,7 +55,12 @@ int main() {
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glfwTerminate();
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return -1;
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}
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glfwMakeContextCurrent(window);
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glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwSetCursorPosCallback(window, mouse_callback);
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glfwSetScrollCallback(window, scroll_callback);
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// 加载glad
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if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
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@ -62,12 +68,6 @@ int main() {
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return -1;
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}
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// 设置视口
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glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwSetCursorPosCallback(window, mouse_callback);
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glfwSetScrollCallback(window, scroll_callback);
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// 创建着色器程序
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Shader shader = Shader("src/tex.vs", "src/tex.fs");
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@ -90,7 +90,7 @@ int main() {
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// 顶点属性
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void *)0);
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glEnableVertexAttribArray(0);
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// 颜色属性
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// 法向量属性
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float),
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(void *)(3 * sizeof(float)));
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glEnableVertexAttribArray(1);
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@ -133,6 +133,19 @@ int main() {
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shader.use();
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// 绑定纹理
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shader.setInt("tex", 0);
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// // 直射光
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shader.setVec3("dirLight.direction", 2.0f, 0.0f, 0.0f);
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shader.setVec3("dirLight.ambient", 0.2f, 0.2f, 0.2f);
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shader.setVec3("dirLight.diffuse", 0.6f, 0.6f, 0.6f);
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shader.setVec3("dirLight.specular", 0.7f, 0.7f, 0.7f);
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// 点光源
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shader.setVec3("pointLighs.position", glm::vec3(-0.5f, -2.0f, -0.5f));
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shader.setVec3("pointLight.ambient", 0.2f, 0.2f, 0.2f);
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shader.setVec3("pointLight.diffuse", 3.0f, 3.0f, 3.0f);
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shader.setVec3("pointLight.specular", 3.0f, 3.0f, 3.0f);
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shader.setFloat("pointLight.constant", 1.0f);
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shader.setFloat("pointLight.linear", 0.00014f);
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shader.setFloat("pointLight.quadratic", 0.0000007f);
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// 开启深度测试
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glEnable(GL_DEPTH_TEST);
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@ -165,23 +178,34 @@ int main() {
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shader.use();
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glBindVertexArray(VAO);
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shader.setVec3("viewPos", camera.Position);
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shader.setMat4("view", view);
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shader.setMat4("projection", projection);
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// 设置材质
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shader.setVec3("material.ambient", 1.0f, 0.5f, 0.31f);
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shader.setVec3("material.diffuse", 1.0f, 0.5f, 0.31f);
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shader.setVec3("material.specular", 0.5f, 0.5f, 0.5f);
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shader.setFloat("material.shininess", 4.0f);
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glm::mat4 trans(1.0f);
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trans = glm::rotate(trans, glm::radians(-90.0f), glm::vec3(1.0, 0.0, 0.0));
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trans = glm::rotate(trans, float(-sin((float)glfwGetTime())),
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glm::vec3(0.0, 1.0, 0.0));
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trans = glm::translate(trans, glm::vec3(-0.2, 0.0, 0.0));
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shader.setMat4("trans", trans);
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
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// 设置材质
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shader.setVec3("material.ambient", 1.0f, 0.5f, 0.31f);
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shader.setVec3("material.diffuse", 0.75f, 0.6f, 0.23f);
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shader.setVec3("material.specular", 0.62f, 0.55f, 0.37f);
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shader.setFloat("material.shininess", 64.0f);
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trans = glm::mat4(1.0f);
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trans = glm::rotate(trans, glm::radians(-90.0f), glm::vec3(1.0, 0.0, 0.0));
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trans = glm::rotate(trans, float(sin((float)glfwGetTime())),
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glm::vec3(0.0, 1.0, 0.0));
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trans = glm::translate(trans, glm::vec3(0.2, 0.0, 0.0));
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trans = glm::rotate(trans, glm::radians(180.0f), glm::vec3(0.0, 1.0, 0.0));
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// trans = glm::rotate(trans, (float)glfwGetTime(), glm::vec3(0.0, 0.5,
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// 0.5)); trans = glm::scale(trans, glm::vec3(0.5, 0.5, 0.5));
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shader.setMat4("trans", trans);
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
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@ -209,11 +233,8 @@ void processInput(GLFWwindow *window) {
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camera.ProcessKeyboard(RIGHT, deltaTime);
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if (glfwGetKey(window, GLFW_KEY_SPACE) == GLFW_PRESS)
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camera.ProcessKeyboard(UP, deltaTime);
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if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS)
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camera.ProcessKeyboard(DOWN, deltaTime);
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}
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// 窗口大小改变时回调该函数
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void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
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glViewport(0, 0, width, height);
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@ -1,14 +1,140 @@
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#version 330 core
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out vec4 FragColor;
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in vec3 ourColor;
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struct Material {
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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float shininess;
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};
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struct DirLight {
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vec3 direction;
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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};
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struct PointLight {
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vec3 position;
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float constant;
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float linear;
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float quadratic;
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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};
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struct SpotLight {
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vec3 position;
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vec3 direction;
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float cutOff;
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float outerCutOff;
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float constant;
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float linear;
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float quadratic;
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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};
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in vec3 FragPos;
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in vec3 Normal;
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in vec2 TexCoord;
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uniform sampler2D tex;
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uniform vec3 viewPos;
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//直射光
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uniform DirLight dirLight;
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//点光源
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uniform PointLight pointLight;
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//材质
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uniform Material material;
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out vec4 FragColor;
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vec3 CalcDirLight(DirLight light, vec3 normal, vec3 viewDir);
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vec3 CalcPointLight(PointLight light, vec3 normal, vec3 fragPos, vec3 viewDir);
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vec3 CalcSpotLight(SpotLight light, vec3 normal, vec3 fragPos, vec3 viewDir);
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void main() {
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// FragColor = texture(tex, TexCoord) * vec4(ourColor, 1.0);
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vec3 norm = normalize(Normal);
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vec3 viewDir = normalize(viewPos - FragPos);
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// 第一阶段：定向光照
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vec3 result = CalcDirLight(dirLight, norm, viewDir);
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// 第二阶段：点光源
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result += CalcPointLight(pointLight, norm, FragPos, viewDir);
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if (texture(tex, TexCoord).a < 0.7)
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discard;
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FragColor = texture(tex, TexCoord);
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FragColor = vec4(result,1.0) * texture(tex, TexCoord);
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}
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// calculates the color when using a directional light.
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vec3 CalcDirLight(DirLight light, vec3 normal, vec3 viewDir)
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{
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vec3 lightDir = normalize(-light.direction);
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// diffuse shading
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float diff = max(dot(normal, lightDir), 0.0);
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// specular shading
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vec3 reflectDir = reflect(-lightDir, normal);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
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// combine results
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vec3 ambient = light.ambient * material.ambient * vec3(texture(tex, TexCoord));
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vec3 diffuse = light.diffuse * diff *material.diffuse * vec3(texture(tex, TexCoord));
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vec3 specular = light.specular * spec * material.specular * vec3(texture(tex, TexCoord));
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return (ambient + diffuse + specular);
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}
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// calculates the color when using a point light.
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vec3 CalcPointLight(PointLight light, vec3 normal, vec3 fragPos, vec3 viewDir)
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{
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vec3 lightDir = normalize(light.position - fragPos);
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// diffuse shading
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float diff = max(dot(normal, lightDir), 0.0);
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// specular shading
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vec3 reflectDir = reflect(-lightDir, normal);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
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// attenuation
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float distance = length(light.position - fragPos);
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float attenuation = 1.0 / (light.constant + light.linear * distance + light.quadratic * (distance * distance));
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// combine results
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vec3 ambient = light.ambient * material.ambient * vec3(texture(tex, TexCoord));
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vec3 diffuse = light.diffuse * diff *material.diffuse * vec3(texture(tex, TexCoord));
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vec3 specular = light.specular * spec * material.specular * vec3(texture(tex, TexCoord));
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ambient *= attenuation;
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diffuse *= attenuation;
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specular *= attenuation;
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return (ambient + diffuse + specular);
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}
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// calculates the color when using a spot light.
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vec3 CalcSpotLight(SpotLight light, vec3 normal, vec3 fragPos, vec3 viewDir)
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{
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vec3 lightDir = normalize(light.position - fragPos);
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// diffuse shading
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float diff = max(dot(normal, lightDir), 0.0);
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// specular shading
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vec3 reflectDir = reflect(-lightDir, normal);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
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// attenuation
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float distance = length(light.position - fragPos);
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float attenuation = 1.0 / (light.constant + light.linear * distance + light.quadratic * (distance * distance));
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// spotlight intensity
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float theta = dot(lightDir, normalize(-light.direction));
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float epsilon = light.cutOff - light.outerCutOff;
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float intensity = clamp((theta - light.outerCutOff) / epsilon, 0.0, 1.0);
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// combine results
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vec3 ambient = light.ambient * material.ambient * vec3(texture(tex, TexCoord));
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vec3 diffuse = light.diffuse * diff *material.diffuse * vec3(texture(tex, TexCoord));
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vec3 specular = light.specular * spec * material.specular * vec3(texture(tex, TexCoord));
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ambient *= attenuation * intensity;
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diffuse *= attenuation * intensity;
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specular *= attenuation * intensity;
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return (ambient + diffuse + specular);
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}
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@ -1,19 +1,23 @@
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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 aColor;
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layout (location = 2) in vec2 aTexCoord;
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layout(location = 0) in vec3 aPos;
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layout(location = 1) in vec3 aNormal;
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layout(location = 2) in vec2 aTexCoord;
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out vec3 ourColor;
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out vec2 TexCoord;
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out vec3 FragPos;
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out vec3 Normal;
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out vec2 TexCoords;
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uniform mat4 trans;
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uniform mat4 view;
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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 * trans * vec4(aPos, 1.0);
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// gl_Position = trans * vec4(aPos, 1.0);
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ourColor = aColor;
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TexCoord = aTexCoord;
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void main() {
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// 计算角度
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FragPos = vec3(trans * vec4(aPos, 1.0));
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// 计算法向量
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Normal = mat3(transpose(inverse(trans))) * aNormal;
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gl_Position = projection * view * trans * vec4(aPos, 1.0);
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TexCoord = aTexCoord;
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}
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