X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=main.cpp;h=776b3d6e283eac14f54b0c086da5d090e79800e5;hp=4cc4280be0180f5f44d86e7c426a99c8a7d2d771;hb=d2a4cfcd292f5bc422a025d43855e5f4f21fb161;hpb=f26de7de42a3d0a52365de79f528fcea808e2bca

diff --git a/main.cpp b/main.cpp
index 4cc4280..776b3d6 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,230 +1,388 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <iostream>
-#include <fstream>
-#include <sstream>
 #include <array>
 #include <vector>
+#include <dirent.h>
 #ifdef __APPLE__
 #include <GL/glew.h>
 #else
 #include <OpenGL/glew.h>
 #endif
 #include <GLUT/glut.h>
+#include "shapes.hpp"
 #include <glm/glm.hpp>
 #include <glm/ext.hpp>
 #include <glm/gtc/type_ptr.hpp>
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+#include <assimp/postprocess.h>
+#include "model.hpp"
+#include "program.hpp"
+#include "skybox.hpp"
+#include "image.hpp"
+#include "util.hpp"
+#include "ik.hpp"
+#include "blendshapes.hpp"
+#include "ui.h"
 
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
 
 using namespace std;
 
-GLuint* vaos;
-GLuint progId;
-glm::vec3 camPos   = glm::vec3(0.0f, 0.0f,  -5.0f);
-glm::vec3 camFront = glm::vec3(0.0f, 0.0f, 1.0f);
-glm::vec3 camUp    = glm::vec3(0.0f, 1.0f,  0.0f);
-float yaw = 1.57, pitch = 0;
-bool doScale, doRotate, doTranslate;
+GLuint lightVao;
 
-void display() {
-	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
-	glUseProgram(progId);
-	glBindVertexArray(vaos[0]);
-	for (int i = 0; i < 100; i++) {
+Program *textureProg, *plainProg, *reflectProg, *pbrProg;
 
-		GLuint projId = glGetUniformLocation(progId, "projection");
-		glm::mat4 proj = glm::perspective(glm::radians(45.f), 1.33f, 0.01f, 10000.f);
-		glUniformMatrix4fv(projId, 1, GL_FALSE, glm::value_ptr(proj));
+std::vector<Skybox> skyboxes;
+int activeSkybox = 0;
 
-		GLuint viewId = glGetUniformLocation(progId, "view");
-		glm::mat4 view = glm::lookAt(camPos, camPos + camFront, camUp);
-		glUniformMatrix4fv(viewId, 1, GL_FALSE, glm::value_ptr(view));
+Assimp::Importer importer; // Need to keep this around, otherwise stuff disappears!
+Model *sceneModel;
 
-		GLuint modelId = glGetUniformLocation(progId, "model");
-		glm::mat4 model = glm::mat4(1.f);
+glm::vec3 camPos = {0, 0, -5}, camFront = {0, 0, 1}, camUp = {0, 1, 0};
+float fov = glm::radians(30.f), znear = 0.01f, zfar = 10000.f;
+float yaw = 1.57, pitch = 0;
 
-		float d = (float)glutGet(GLUT_ELAPSED_TIME) * 0.001f;
-		model = glm::translate(model, glm::vec3(sin(i * 30) * 10, cos(i * 30) * 10, i * 2));
+Model *targetModel; // The model that the selection is happening on
+glm::vec3 closestVertex;
+std::vector<glm::vec3> manipulators;
+Blendshapes blendshapes;
+float *blendshapeWeights;
 
-		if (doRotate) {
-			model = glm::rotate(model, d * glm::radians(30.f), glm::vec3(0.f, 1.f, 0.f));
-			model = glm::rotate(model, d * glm::radians(20.f), glm::vec3(1.f, 0.f, 0.f));
-		}
+struct Light {
+	glm::mat4 trans;
+	glm::vec3 color;
+};
 
-		if (doScale)
-			model = glm::scale(model, glm::vec3(1.f, 0.7f + 0.7f * (1 + sin(d + (i + 3))), 1.f));
+std::vector<Light> lights;
 
-		if (doTranslate)
-			model = glm::translate(model, glm::vec3(sin(d + (i + 1)), cos(d + (i + -3)), sin(d + (i + 4))));
+bool discoLights = false;
 
+int windowWidth = 800, windowHeight = 600;
 
-		glUniformMatrix4fv(modelId, 1, GL_FALSE, glm::value_ptr(model));
+enum Mode {
+	Default,
+	Blendshapes
+};
+Mode curMode;
 
-		glDrawArrays(GL_TRIANGLES, 0, 12);
+float aspect() {
+	return (float)windowWidth / (float)windowHeight;
 }	
-	glutSwapBuffers();
+
+inline glm::mat4 projMat() {
+	return glm::perspective(fov, aspect(), znear, zfar);
 }
 
-void attachShader(GLuint progId, const char* filePath, GLenum type) {
-	GLuint shader = glCreateShader(type);
+inline glm::mat4 viewMat() {
+	return glm::lookAt(camPos, camPos + camFront, camUp);
+}
 
-	if (!shader) {
-		fprintf(stderr, "error creating shader\n");
-		exit(1);
+void setProjectionAndViewUniforms(GLuint progId) {
+	GLuint projLoc = glGetUniformLocation(progId, "projection");
+	glm::mat4 proj = projMat();
+	glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(proj));
+
+	GLuint viewLoc = glGetUniformLocation(progId, "view");
+	glm::mat4 view = viewMat();
+	glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
+
+	GLuint camPosLoc = glGetUniformLocation(progId, "camPos");
+	glUniform3fv(camPosLoc, 1, glm::value_ptr(camPos));
 }
 
-	ifstream file(filePath);
-	stringstream buffer;
-	buffer << file.rdbuf();
-	string str = buffer.str();
-	const char* contents = str.c_str();
-
-	glShaderSource(shader, 1, (const GLchar**)&contents, NULL);
-	glCompileShader(shader);
-	GLint success;
-	glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
-	if (!success) {
-		GLchar log[1024];
-		glGetShaderInfoLog(shader, 1024, NULL, log);
-		fprintf(stderr, "error: %s\n", log);
-		exit(1);
+void setLightColorAndPos(GLuint progId, glm::vec3 lightPos, glm::vec4 lightColor) {
+	GLuint lightColorLoc = glGetUniformLocation(progId, "lightColor");
+	glUniform4fv(lightColorLoc, 1, glm::value_ptr(lightColor));
+
+	GLuint lightPosLoc = glGetUniformLocation(progId, "vLightPos");
+	glUniform3fv(lightPosLoc, 1, glm::value_ptr(lightPos));
+
+	GLuint viewPosLoc = glGetUniformLocation(progId, "vViewPos");
+	glUniform3fv(viewPosLoc, 1, glm::value_ptr(camPos));
 }
-	glAttachShader(progId, shader);
+
+void drawBox(glm::mat4 trans, glm::vec3 color) {
+  	glUseProgram(plainProg->progId);
+	glBindVertexArray(lightVao);
+	setProjectionAndViewUniforms(plainProg->progId);
+	glm::mat4 model = glm::scale(trans, glm::vec3(0.3));
+	GLuint modelLoc = glGetUniformLocation(plainProg->progId, "model");
+	glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
+
+	GLuint colorLoc = glGetUniformLocation(plainProg->progId, "color");
+	glUniform4fv(colorLoc, 1, glm::value_ptr(color));
+		
+	glDrawArrays(GL_TRIANGLES, 0, 36);
 }
 
-GLuint compileShaders(char* vertexShader, char* fragmentShader) {
-	GLuint progId = glCreateProgram();
+void drawLight(Light &light) {
+	drawBox(light.trans, light.color);
+}
 
-	attachShader(progId, vertexShader, GL_VERTEX_SHADER);
-	attachShader(progId, fragmentShader, GL_FRAGMENT_SHADER);
+int findNodeTrans(const struct aiNode *n, const struct aiString name, glm::mat4 *dest) {
+	if (strcmp(n->mName.data, name.data) == 0) {
+		*dest = aiMatrixToMat4(n->mTransformation);
+		return 0;
+	}
+	for (int i = 0; i < n->mNumChildren; i++) {
+		if (findNodeTrans(n->mChildren[i], name, dest) == 0) {
+			glm::mat4 t = aiMatrixToMat4(n->mTransformation);
+			*dest = t * *dest;
+			return 0;
+		}
+	}
+	return 1;
+}
 
-	glLinkProgram(progId);
-	GLint success = 0;
-	glGetProgramiv(progId, GL_LINK_STATUS, &success);
-	if (!success) {
-		GLchar log[1024];
-		glGetProgramInfoLog(progId, sizeof(log), NULL, log);
-		fprintf(stderr, "error linking: %s\n", log);
-		exit(1);
+glm::mat4 worldSpaceToModelSpace(aiNode *node, glm::mat4 m) {
+	aiNode *parent = node;
+	glm::mat4 res = m;
+	std::vector<glm::mat4> trans;
+	while (parent != nullptr) {
+		/* res = res * glm::inverse(aiMatrixToMat4(parent->mTransformation)); */
+		trans.push_back(glm::inverse(aiMatrixToMat4(parent->mTransformation)));
+		parent = parent->mParent;
+	}
+	while (!trans.empty()) { res = trans.back() * res; trans.pop_back(); }
+	return res;
 }
 
-	return progId;
+void highlightVertex() {
+	drawBox(glm::translate(glm::mat4(1), closestVertex), {1, 1, 0.5});
 }
 
-#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+void display() {
+	glClearColor(0.5, 0.5, 0.5, 1);
+	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+	glViewport(0, 0, windowWidth * 2, windowHeight * 2);
 
-GLuint setupBuffers(GLfloat* vertices, GLuint progId) {
+	float d = (float)glutGet(GLUT_ELAPSED_TIME) * 0.001f;
 
-	GLfloat colors[] = {
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1,
+	glUseProgram(getUtilProg()->progId);
+	setProjectionAndViewUniforms(getUtilProg()->progId);
 
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1,
+	glUseProgram(pbrProg->progId);
+	setProjectionAndViewUniforms(pbrProg->progId);
 
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1,
+	size_t numLights = lights.size() + (discoLights ? 3 : 0);
+	glm::vec3 lightPositions[numLights], lightColors[numLights];
+	for (int i = 0; i < lights.size(); i++) {
+		lightPositions[i] = glm::vec3(lights[i].trans[3]);
+		lightColors[i] = lights[i].color;
+	}
 
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1
-	};
+	if (discoLights) {
+		for (int i = numLights - 3; i < numLights; i++) {
+			auto m = glm::translate(glm::mat4(1.f), glm::vec3(-2.5, 0, 0));
+			m = glm::rotate(m, glm::radians(d * 100 + i * 30), glm::vec3(1, 0, 0));
+			m = glm::rotate(m, glm::radians(d * 100 + i * 30), glm::vec3(0, 1, 0));
+			m = glm::rotate(m, glm::radians(d * 100 + i * 30), glm::vec3(0, 0, 1));
+			lightPositions[i] = glm::vec3(m * glm::vec4(5, 0, 0, 1));
+			lightColors[i] = glm::vec3(0.2);
+			if (i % 3 == 0) lightColors[i].x = sin(d);
+			if (i % 3 == 1) lightColors[i].y = cos(d * 3);
+			if (i % 3 == 2) lightColors[i].z = cos(d);
+		}
+	}
 
-	GLuint numVerts = 12;
+	glUniform1ui(glGetUniformLocation(pbrProg->progId, "numLights"), numLights);
+	glUniform3fv(glGetUniformLocation(pbrProg->progId, "lightPositions"), numLights, glm::value_ptr(lightPositions[0]));
+	glUniform3fv(glGetUniformLocation(pbrProg->progId, "lightColors"), numLights, glm::value_ptr(lightColors[0]));
+
+#ifdef COWEDBOY_IK
+	{ 
+		glm::vec3 targetPos(sin(d) * 2 + 3, -2, 1);
+		Light targetLight = { glm::translate(glm::mat4(1), targetPos), {0.5, 1, 1}  };
+		drawLight(targetLight);
+		inverseKinematics(*sceneModel->find("Shoulder.L"), *sceneModel->find("Finger.L"), targetPos);
+
+		targetPos = { sin(d * 2) * 2 - 5, 2.5, 0 };
+		targetLight = { glm::translate(glm::mat4(1), targetPos), {1, 1, 0.5}  };
+		drawLight(targetLight);
+		inverseKinematics(*sceneModel->find("Shoulder.R"), *sceneModel->find("Finger.R"), targetPos);
+	}
+#endif
 
-	GLuint vbo;
-	glGenBuffers(1, &vbo);
+	if (curMode == Default)
+		sceneModel->draw(skyboxes[activeSkybox], d * 1000);
 
-	GLuint vao;
-	glGenVertexArrays(1, &vao);
+	if (curMode == Blendshapes) {
+		highlightVertex();
 
-	GLuint posId = glGetAttribLocation(progId, "vPosition");
-	GLuint colorId = glGetAttribLocation(progId, "vColor");
+		for (auto v: manipulators)
+			drawBox(glm::translate(glm::mat4(1), v), {0.2, 1, 0});
 
-	GLuint vertsLen = numVerts * 3 * sizeof(GLfloat);
-	GLuint colorsLen = numVerts * 4 * sizeof(GLfloat);
+		blendshapes.model->draw(skyboxes[activeSkybox], d * 1000);
+	}
 
-	glBindBuffer(GL_ARRAY_BUFFER, vbo);
-	glBufferData(GL_ARRAY_BUFFER, vertsLen + colorsLen, NULL, GL_STATIC_DRAW);
+	for (Light &light: lights) drawLight(light);
 
-	glBufferSubData(GL_ARRAY_BUFFER, 0, vertsLen, vertices);
-	glBufferSubData(GL_ARRAY_BUFFER, vertsLen, colorsLen, colors);
+	// TODO: restore
+	/* if (discoLights) { */
+	/* 	for (int i = numLights - 3; i < numLights; i++) { */
+	/* 		Light l = { lightPositions[i], lightColors[i] }; */
+	/* 		drawLight(l); */
+	/* 	} */
+	/* } */
 
-	glBindVertexArray(vao);
-	glEnableVertexAttribArray(posId);
-	glVertexAttribPointer(posId, 3, GL_FLOAT, GL_FALSE, 0, 0);
+	skyboxes[activeSkybox].draw(projMat(), viewMat());
+
+	glutSwapBuffers();
+}
 
-	glEnableVertexAttribArray(colorId);
-	glVertexAttribPointer(colorId, 4, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(numVerts * 3 * sizeof(GLfloat)));
+void setupLightBuffers(GLuint progId) {
+  	auto vertices = cube();
+	GLuint verticesSize = 36 * 3 * sizeof(GLfloat);
 
-	return vao;
+	glGenVertexArrays(1, &lightVao);
+	GLuint vbo;
+	glBindVertexArray(lightVao);
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, verticesSize, NULL, GL_STATIC_DRAW);
+	glBufferSubData(GL_ARRAY_BUFFER, 0, verticesSize, glm::value_ptr(vertices[0]));
+	GLuint posLoc = glGetAttribLocation(progId, "vPosition");
+	glEnableVertexAttribArray(posLoc);
+	glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
 }
 
-void validateProgram(GLuint progId) {
-	glValidateProgram(progId);
+void weightsChanged(int blendshape, float weight) {
+	blendshapeWeights[blendshape] = weight;
+	std::vector<float> weights;
+	weights.assign(blendshapeWeights, blendshapeWeights + blendshapes.deltas.size());
+	interpolateBlendshapes(&blendshapes, weights);
+}
 
-	GLint success;
-	glGetProgramiv(progId, GL_VALIDATE_STATUS, &success);
-	if (!success) {
-		GLchar log[1024];
-		glGetProgramInfoLog(progId, sizeof(log), NULL, log);
-		fprintf(stderr, "error: %s\n", log);
-		exit(1);
+void loadBlendshapes() {
+
+	// get all the obj files
+	std::vector<std::string> blends;
+	const std::string modelDir = "models/high-res-blendshapes/";
+	DIR *blendDir = opendir(modelDir.c_str());
+	while (dirent *e = readdir(blendDir)) {
+		if (e->d_type & DT_DIR) continue;
+		const std::string name(e->d_name);
+		if (name == "neutral.obj") continue;
+		blends.push_back(name);
 	}
+	closedir(blendDir);
+
+	std::vector<std::string> blendFps;
+	for (auto blend: blends) blendFps.push_back(modelDir + blend);
+	createBlendshapes(blendFps, modelDir + "neutral.obj", *pbrProg, &blendshapes);
+	targetModel = blendshapes.model;
+
+	size_t numBlends = blends.size();
+	blendshapeWeights = new float[numBlends];
+	for (int i = 0; i < numBlends; i++) blendshapeWeights[i] = 0;
+	const char *names[numBlends];
+	for (int i = 0; i < numBlends; i++) names[i] = blends[i].c_str();
+	createControlWindow(numBlends, names, weightsChanged);
+
+	camPos = { 0, 22, 81 };
+	camFront = { 0, 0, -1 };
+	camUp = { 0, 1, 0 };
+	zfar = 10000;
+	znear = 0.1f;
 }
 
 void init() {
-	GLfloat vertices[9*4] = {
-		-1.0f, -1.0f, -1.0f,
-		1.0f, -1.0f, -1.0f,
-		0.0f, 1.0f, 0.0f,
+	initUtilProg();
+
+	plainProg = new Program("plainvertex.glsl", "plainfrag.glsl");
+	glUseProgram(plainProg->progId);
+	setupLightBuffers(plainProg->progId);
+	plainProg->validate();
+
+	skyboxes.push_back(Skybox(Image("skyboxes/loft/Newport_Loft_Ref.hdr")));
+	skyboxes.push_back(Skybox(Image("skyboxes/wooden_lounge_8k.hdr")));
+	skyboxes.push_back(Skybox(Image("skyboxes/machine_shop_02_8k.hdr")));
+	skyboxes.push_back(Skybox(Image("skyboxes/pink_sunrise_8k.hdr")));
+
+	pbrProg = new Program("pbrvert.glsl", "pbrfrag.glsl");
+	glUseProgram(pbrProg->progId);
+
+	if (curMode == Default) {
+		const std::string scenePath = "models/cowedboy.glb";
+		const aiScene *scene = importer.ReadFile(
+				scenePath, aiProcess_Triangulate | aiProcess_CalcTangentSpace |
+				aiProcess_GenNormals | aiProcess_FlipUVs);
+		if (!scene) {
+			std::cerr << importer.GetErrorString() << std::endl;
+			exit(1);
+		}
 
-		-1.0f, -1.0f, 1.0f,
-		1.0f, -1.0f, 1.0f,
-		0.0f, 1.0f, 0.0f,
+		if (scene->mNumCameras > 0) {
+			aiCamera *cam = scene->mCameras[0];
+			glm::mat4 camTrans;
+			if (findNodeTrans(scene->mRootNode, cam->mName, &camTrans) != 0)
+				abort(); // there must be a node with the same name as camera
 
-		-1.0f, -1.0f, -1.0f,
-		-1.0f, -1.0f, 1.0f,
-		0.0f, 1.0f, 0.0f,
+			camPos = {camTrans[3][0], camTrans[3][1], camTrans[3][2]};
 
-		1.0f, -1.0f, -1.0f,
-		1.0f, -1.0f, 1.0f,
-		0.0f, 1.0f, 0.0f
+			glm::vec3 camLookAt =
+				glm::vec3(cam->mLookAt.x, cam->mLookAt.y, cam->mLookAt.z);
+			camFront = camLookAt - camPos;
 
-	};
+			camUp = glm::vec3(cam->mUp.x, cam->mUp.y, cam->mUp.z);
 
-	vaos = new GLuint[2];
+			fov = cam->mHorizontalFOV;
+			// TODO: aspectRatio = cam->mAspect;
+			znear = cam->mClipPlaneNear;
+			zfar = cam->mClipPlaneFar;
+		}
+
+		for (int i = 0; i < scene->mNumLights; i++) {
+			aiLight *light = scene->mLights[i];
+			glm::mat4 trans;
+			findNodeTrans(scene->mRootNode, light->mName, &trans);
+			glm::vec3 col = {light->mColorAmbient.r, light->mColorAmbient.g,
+				light->mColorAmbient.b};
+			Light l = {trans, col};
+			lights.push_back(l);
+		}
+
+		sceneModel = new Model(scene, *pbrProg);
+	}
 
-	progId = compileShaders((char*)"vertex.glsl", (char*)"fragment.glsl");
-	glUseProgram(progId);
-	vaos[0] = setupBuffers(vertices, progId);
-	validateProgram(progId);
+	if (curMode == Blendshapes) {
+		loadBlendshapes();
+	}
 
 	glEnable(GL_DEPTH_TEST); 
+	glEnable(GL_CULL_FACE); 
+	// prevent edge artifacts in specular cubemaps
+	glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+
+	glViewport(0, 0, windowWidth * 2, windowHeight * 2);
 }
 
-bool* keyStates = new bool[256];
+bool keyStates[256] = {false};
 
 void keyboard(unsigned char key, int x, int y) {
 	keyStates[key] = true;
 	if (key == 'z')
-		doScale = !doScale;
-	if (key == 'x')
-		doRotate = !doRotate;
+		activeSkybox = (activeSkybox + 1) % skyboxes.size();
 	if (key == 'c')
-		doTranslate = !doTranslate;
+		discoLights = !discoLights;
 }
 
 void keyboardUp(unsigned char key, int x, int y) {
 	keyStates[key] = false;
 }
 
+int mouseX, mouseY;
+bool needToCalculateClosestVertex = false;
+
+/* #define ENABLE_MOVEMENT */
 void timer(int _) {
+#ifdef ENABLE_MOVEMENT
 	float xSpeed = 0.f, ySpeed = 0.f, zSpeed = 0.f;
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wchar-subscripts"
 	if (keyStates['w'])
 		zSpeed = 0.1f;
 	if (keyStates['s'])
@@ -237,10 +395,25 @@ void timer(int _) {
 		ySpeed = 0.1f;
 	if (keyStates['e'])
 		ySpeed = -0.1f;
+#pragma clang diagnostic pop
 
 	camPos.x += xSpeed * sin(yaw) + zSpeed * cos(yaw);
 	camPos.y += ySpeed;
 	camPos.z += zSpeed * sin(yaw) - xSpeed * cos(yaw);
+#endif
+
+	if (needToCalculateClosestVertex) {
+		GLint vpArr[4]; glGetIntegerv(GL_VIEWPORT, vpArr);
+		glm::vec4 viewport(vpArr[0], vpArr[1], vpArr[2], vpArr[3]);
+		glm::vec3 selectedPos = glm::unProject(glm::vec3(mouseX * 2, viewport[3] - mouseY * 2, 1), // hidpi
+				viewMat(),
+				projMat(),
+				viewport);
+
+		closestVertex = targetModel->closestVertex(targetModel->getRoot(), camPos, selectedPos).first;
+		needToCalculateClosestVertex = false;
+	}
+
 	glutPostRedisplay();
 	glutTimerFunc(16, timer, 0);
 }
@@ -249,6 +422,7 @@ int prevMouseX, prevMouseY;
 bool firstMouse = true;
 
 void motion(int x, int y) {
+#ifdef ENABLE_MOVEMENT
 	if (firstMouse) {
 		prevMouseX = x;
 		prevMouseY = y;
@@ -268,28 +442,52 @@ void motion(int x, int y) {
 	front.y = sin(pitch);
 	front.z = cos(pitch) * sin(yaw);
 	camFront = glm::normalize(front);
+
+	if (pitch < -1.57079632679 || pitch >= 1.57079632679) {
+		camUp = glm::vec3(0, -1, 0);
+	} else {
+		camUp = glm::vec3(0, 1, 0);
+	}
+#endif
+
+	mouseX = x; mouseY = y;
+	needToCalculateClosestVertex = true;
+
 }
 
 void mouse(int button, int state, int x, int y) {
+	if (button == GLUT_LEFT_BUTTON && state == GLUT_UP)
+		manipulators.push_back(closestVertex);
+
+#ifdef ENABLE_MOVEMENT
 	if (button == GLUT_LEFT_BUTTON && state == GLUT_UP)
 		firstMouse = true;
+#endif
+}
+
+void reshape(int newWidth, int newHeight) {
+	windowWidth = newWidth, windowHeight = newHeight;
 }
 
 int main(int argc, char** argv) {
 	glutInit(&argc, argv);
 	glutInitDisplayMode(GLUT_DEPTH|GLUT_DOUBLE|GLUT_RGB|GLUT_3_2_CORE_PROFILE);
-	glutInitWindowSize(800, 600);
-	int win = glutCreateWindow("Hello Triangle");
+	glutInitWindowSize(windowWidth, windowHeight);
+	glutCreateWindow("Physically Based Rendering");
 	glutDisplayFunc(display);
+	glutReshapeFunc(reshape);
 
 	glewInit();
 
+	// TODO: parse argv
+	curMode = Blendshapes;
 	init();
 
 	glutKeyboardFunc(keyboard);
 	glutKeyboardUpFunc(keyboardUp);
 	glutTimerFunc(16, timer, 0);
 	glutMotionFunc(motion);
+	glutPassiveMotionFunc(motion);
 	glutMouseFunc(mouse);
 
 	glutMainLoop();