Include cpp skeletal animation tutorial file.

src/8.guest/2020/skeletal_animation/skeletal_animation.cpp

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+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+#include <learnopengl/filesystem.h>
+#include <learnopengl/shader_m.h>
+#include <learnopengl/camera.h>
+#include <learnopengl/animator.h>
+#include <learnopengl/model.h>
+
+
+
+#include <iostream>
+
+
+void framebuffer_size_callback(GLFWwindow* window, int width, int height);
+void mouse_callback(GLFWwindow* window, double xpos, double ypos);
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
+void processInput(GLFWwindow* window);
+
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
+// camera
+Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
+float lastX = SCR_WIDTH / 2.0f;
+float lastY = SCR_HEIGHT / 2.0f;
+bool firstMouse = true;
+
+// timing
+float deltaTime = 0.0f;
+float lastFrame = 0.0f;
+
+int main()
+{
+	// glfw: initialize and configure
+	// ------------------------------
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+#ifdef __APPLE__
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+
+	// glfw window creation
+	// --------------------
+	GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
+	if (window == NULL)
+	{
+		std::cout << "Failed to create GLFW window" << std::endl;
+		glfwTerminate();
+		return -1;
+	}
+	glfwMakeContextCurrent(window);
+	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+	glfwSetCursorPosCallback(window, mouse_callback);
+	glfwSetScrollCallback(window, scroll_callback);
+
+	// tell GLFW to capture our mouse
+	glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+	// glad: load all OpenGL function pointers
+	// ---------------------------------------
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+	{
+		std::cout << "Failed to initialize GLAD" << std::endl;
+		return -1;
+	}
+
+	// tell stb_image.h to flip loaded texture's on the y-axis (before loading model).
+	stbi_set_flip_vertically_on_load(true);
+
+	// configure global opengl state
+	// -----------------------------
+	glEnable(GL_DEPTH_TEST);
+
+	// build and compile shaders
+	// -------------------------
+	Shader ourShader("anim_model_vs.glsl", "anim_model_fs.glsl");
+
+	
+	// load models
+	// -----------
+	Model ourModel(FileSystem::getPath("resources/objects/vampire/dancing_vampire.dae"));
+	Animation danceAnimation(FileSystem::getPath("resources/objects/vampire/dancing_vampire.dae"),&ourModel);
+	Animator animator(&danceAnimation);
+
+
+	// draw in wireframe
+	//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+
+	// render loop
+	// -----------
+	while (!glfwWindowShouldClose(window))
+	{
+		// per-frame time logic
+		// --------------------
+		float currentFrame = glfwGetTime();
+		deltaTime = currentFrame - lastFrame;
+		lastFrame = currentFrame;
+
+		// input
+		// -----
+		processInput(window);
+		animator.UpdateAnimation(deltaTime);
+		
+		// render
+		// ------
+		glClearColor(0.05f, 0.05f, 0.05f, 1.0f);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+		// don't forget to enable shader before setting uniforms
+		ourShader.use();
+
+		// view/projection transformations
+		glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
+		glm::mat4 view = camera.GetViewMatrix();
+		ourShader.setMat4("projection", projection);
+		ourShader.setMat4("view", view);
+
+		auto transforms = animator.GetPoseTransforms();
+		for (int i = 0; i < transforms.size(); ++i)
+			ourShader.setMat4("finalBonesTransformations[" + std::to_string(i) + "]", transforms[i]);
+
+
+		// render the loaded model
+		glm::mat4 model = glm::mat4(1.0f);
+		model = glm::translate(model, glm::vec3(0.0f, -0.4f, 0.0f)); // translate it down so it's at the center of the scene
+		model = glm::scale(model, glm::vec3(.5f, .5f, .5f));	// it's a bit too big for our scene, so scale it down
+		ourShader.setMat4("model", model);
+		ourModel.Draw(ourShader);
+
+
+		// glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
+		// -------------------------------------------------------------------------------
+		glfwSwapBuffers(window);
+		glfwPollEvents();
+	}
+
+	// glfw: terminate, clearing all previously allocated GLFW resources.
+	// ------------------------------------------------------------------
+	glfwTerminate();
+	return 0;
+}
+
+// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
+// ---------------------------------------------------------------------------------------------------------
+void processInput(GLFWwindow* window)
+{
+	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+		glfwSetWindowShouldClose(window, true);
+
+	if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
+		camera.ProcessKeyboard(FORWARD, deltaTime);
+	if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
+		camera.ProcessKeyboard(BACKWARD, deltaTime);
+	if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
+		camera.ProcessKeyboard(LEFT, deltaTime);
+	if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
+		camera.ProcessKeyboard(RIGHT, deltaTime);
+}
+
+// glfw: whenever the window size changed (by OS or user resize) this callback function executes
+// ---------------------------------------------------------------------------------------------
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+	// make sure the viewport matches the new window dimensions; note that width and 
+	// height will be significantly larger than specified on retina displays.
+	glViewport(0, 0, width, height);
+}
+
+// glfw: whenever the mouse moves, this callback is called
+// -------------------------------------------------------
+void mouse_callback(GLFWwindow* window, double xpos, double ypos)
+{
+	if (firstMouse)
+	{
+		lastX = xpos;
+		lastY = ypos;
+		firstMouse = false;
+	}
+
+	float xoffset = xpos - lastX;
+	float yoffset = lastY - ypos; // reversed since y-coordinates go from bottom to top
+
+	lastX = xpos;
+	lastY = ypos;
+
+	camera.ProcessMouseMovement(xoffset, yoffset);
+}
+
+// glfw: whenever the mouse scroll wheel scrolls, this callback is called
+// ----------------------------------------------------------------------
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
+{
+	camera.ProcessMouseScroll(yoffset);
+}