X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=main.cpp;h=4dd4e605963d7be0cc169e9fbeb92028baa2e30a;hp=ef18bf2f72de2475d2f8fda9270445bc1f146524;hb=8abaf8f77191e1c660def0832d8036a8b4639ba8;hpb=526f5c3dc0302e541c95ed2198ce8fdb5cdd0b99

diff --git a/main.cpp b/main.cpp
index ef18bf2..4dd4e60 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,8 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <iostream>
-#include <fstream>
-#include <sstream>
 #include <array>
 #include <vector>
 #ifdef __APPLE__
@@ -11,228 +9,154 @@
 #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 "model.hpp"
+#include "program.hpp"
+#include "skybox.hpp"
 
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
 
 using namespace std;
 
-GLuint* vaos;
-GLuint progId;
-glm::vec3 camPos   = glm::vec3(0.0f, 0.0f,  -5.0f);
+GLuint lightVao;
+
+Program *textureProg, *plainProg, *reflectProg;
+Skybox *skybox;
+	  		  
+glm::vec3 camPos   = glm::vec3(0.0f, 0.0f,  0.0f);
 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;
+Model *chest, *mirrorCube;
+glm::vec3 lightPos(3);
 
-void display() {
-	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
-	glUseProgram(progId);
-	glBindVertexArray(vaos[0]);
-
-	float d = (float)glutGet(GLUT_ELAPSED_TIME) * 0.001f;
-
-	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));
-
-	GLuint viewId = glGetUniformLocation(progId, "view");
-	glm::mat4 view = glm::lookAt(camPos, camPos + camFront, camUp);
-	glUniformMatrix4fv(viewId, 1, GL_FALSE, glm::value_ptr(view));
-
-	GLuint lightPosLoc = glGetUniformLocation(progId, "lightPos");
-	glm::vec3 lightPos = glm::vec3(sin(d) * 10, 0, 0);//10 * cos(d));
-	glUniform3fv(lightPosLoc, 1, glm::value_ptr(lightPos));
-	
-	GLuint viewPosLoc = glGetUniformLocation(progId, "viewPos");
-	glUniform3fv(viewPosLoc, 1, glm::value_ptr(camPos));
-
-	GLuint modelId = glGetUniformLocation(progId, "model");
+const int WIDTH = 800, HEIGHT = 600;
+const float ASPECT = (float)WIDTH / (float)HEIGHT;
 
-	for (int i = 0; i < 10; i++) {
-
-		glm::mat4 model = glm::mat4(1.f);
-
-		model = glm::translate(model, glm::vec3(sin(i * 30) * 10, 0, i * 2 - 10));
-		
-		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));
+glm::mat4 projMat() {
+	return glm::perspective(glm::radians(45.f), ASPECT, 0.01f, 10000.f);
 }
 
-		if (doScale)
-			model = glm::scale(model, glm::vec3(1.f, 0.7f + 0.7f * (1 + sin(d + (i + 3))), 1.f));
-
-		if (doTranslate)
-			model = glm::translate(model, glm::vec3(sin(d + (i + 1)), cos(d + (i + -3)), sin(d + (i + 4))));
-	
-
-		glUniformMatrix4fv(modelId, 1, GL_FALSE, glm::value_ptr(model));
-		
-		glDrawArrays(GL_TRIANGLES, 0, 12);
-	}
-	glutSwapBuffers();
+glm::mat4 viewMat() {
+	return glm::lookAt(camPos, camPos + camFront, camUp);
 }
 
-void attachShader(GLuint progId, const char* filePath, GLenum type) {
-	GLuint shader = glCreateShader(type);
+void setProjectionAndViewUniforms(GLuint progId) {
+	GLuint projLoc = glGetUniformLocation(progId, "projection");
+	glm::mat4 proj = projMat();
+	glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(proj));
 
-	if (!shader) {
-		fprintf(stderr, "error creating shader\n");
-		exit(1);
-	}
-
-	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);
-	}
-	glAttachShader(progId, shader);
+	GLuint viewLoc = glGetUniformLocation(progId, "view");
+	glm::mat4 view = viewMat();
+	glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
 }
 
-GLuint compileShaders(char* vertexShader, char* fragmentShader) {
-	GLuint progId = glCreateProgram();
+void setLightColorAndPos(GLuint progId, glm::vec3 lightPos, glm::vec4 lightColor) {
+	GLuint lightColorLoc = glGetUniformLocation(progId, "lightColor");
+	glUniform4fv(lightColorLoc, 1, glm::value_ptr(lightColor));
 
-	attachShader(progId, vertexShader, GL_VERTEX_SHADER);
-	attachShader(progId, fragmentShader, GL_FRAGMENT_SHADER);
-
-	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);
-	}
+	GLuint lightPosLoc = glGetUniformLocation(progId, "vLightPos");
+	glUniform3fv(lightPosLoc, 1, glm::value_ptr(lightPos));
 
-	return progId;
+	GLuint viewPosLoc = glGetUniformLocation(progId, "vViewPos");
+	glUniform3fv(viewPosLoc, 1, glm::value_ptr(camPos));
 }
 
-#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+void drawLight(float d, glm::vec3 lightPos, glm::vec4 lightColor) {
+  	glUseProgram(plainProg->progId);
+	glBindVertexArray(lightVao);
+	setProjectionAndViewUniforms(plainProg->progId);
+	glm::mat4 model = glm::translate(glm::mat4(1.f), lightPos);
+	model = glm::scale(model, glm::vec3(0.2));
+	GLuint modelLoc = glGetUniformLocation(plainProg->progId, "model");
+	glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
 
-GLuint setupBuffers(glm::vec3* vertices, glm::vec3* normals, GLuint progId) {
+	GLuint colorLoc = glGetUniformLocation(plainProg->progId, "color");
+	glm::vec4 color(lightColor);
+	glUniform4fv(colorLoc, 1, glm::value_ptr(color));
 		
-	GLfloat colors[] = {
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1,
-
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1,
+	glDrawArrays(GL_TRIANGLES, 0, 36);
+}
 
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1,
 
-		0, 1, 0, 1,
-		1, 0, 0, 1,
-		0, 0, 1, 1
-	};
+void display() {
+	glClearColor(0.5, 0.5, 0.5, 1);
+	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+	float d = (float)glutGet(GLUT_ELAPSED_TIME) * 0.001f;
 
-	GLuint numVerts = 12;
+	glm::vec4 lightColor(1, 1, 1, 1);
 
-	GLuint vbo;
-	glGenBuffers(1, &vbo);
+	drawLight(d, lightPos, lightColor);
 
-	GLuint vao;
-	glGenVertexArrays(1, &vao);
+	glUseProgram(textureProg->progId);
+	setProjectionAndViewUniforms(textureProg->progId);
+	setLightColorAndPos(textureProg->progId, lightPos, lightColor);
 
-	GLuint posId = glGetAttribLocation(progId, "vPosition");
-	GLuint colorId = glGetAttribLocation(progId, "vColor");
-	GLuint normalLoc = glGetAttribLocation(progId, "vNormal");
+	/* Model::Node *top = chest->find("top"); */
+	/* top->model = glm::translate(glm::mat4(1), glm::vec3(0, 1, -1)); */
+	/* top->model = glm::rotate(top->model, sin(d / 2.5f) * 0.5f, glm::vec3(1, 0, 0)); */
+	/* top->model = glm::translate(top->model, glm::vec3(0, -1, 1)); */
 	
-	GLuint vertsLen = numVerts * 3 * sizeof(GLfloat);
-	GLuint colorsLen = numVerts * 4 * sizeof(GLfloat);
-	GLuint normalLen = numVerts * 3 * sizeof(GLfloat);
+	/* Model::Node *jewels = chest->find("jewels"); */
+	/* jewels->model = glm::scale(glm::mat4(1), glm::vec3((sin(d) + 1.2f) / 2.f)); */
 
-	glBindBuffer(GL_ARRAY_BUFFER, vbo);
-	glBufferData(GL_ARRAY_BUFFER, vertsLen + colorsLen + normalLen, NULL, GL_STATIC_DRAW);
+	/* Model::Node *lock = chest->find("lock"); */
+	/* lock->model = glm::translate(glm::mat4(1), glm::vec3(0.22610, 3.36478, -0.75649)); */
+	/* lock->model = glm::rotate(lock->model, (d / 2.5f), glm::vec3(0, 1, 0.4)); */
+	/* lock->model = glm::translate(lock->model, -glm::vec3(0.22610, 3.36478, -0.75649)); */
 
-	glBufferSubData(GL_ARRAY_BUFFER, 0, vertsLen, glm::value_ptr(vertices[0]));
-	glBufferSubData(GL_ARRAY_BUFFER, vertsLen, colorsLen, colors);
-	glBufferSubData(GL_ARRAY_BUFFER, vertsLen + colorsLen, normalLen, glm::value_ptr(normals[0]));
+	/* Model::Node *key = chest->find("key"); */
+	/* key->model = glm::translate(glm::mat4(1), glm::vec3(0, 0, sin(d))); */
 	
-	glBindVertexArray(vao);
+	/* chest->draw(); */
 
-	glEnableVertexAttribArray(posId);
-	glVertexAttribPointer(posId, 3, GL_FLOAT, GL_FALSE, 0, 0);
+	mirrorCube->draw();
 
-	glEnableVertexAttribArray(colorId);
-	glVertexAttribPointer(colorId, 4, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(vertsLen));
+	skybox->draw(projMat(), viewMat());
 
-	glEnableVertexAttribArray(normalLoc);
-	glVertexAttribPointer(normalLoc, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(vertsLen + colorsLen));
-
-	return vao;
+	glutSwapBuffers();
 }
 
-void validateProgram(GLuint progId) {
-	glValidateProgram(progId);
+void setupLightBuffers(GLuint progId) {
+  	auto vertices = cube();
+	GLuint verticesSize = 36 * 3 * sizeof(GLfloat);
 
-	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);
-	}
+	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 init() {
-	glm::vec3 vertices[12] = {
-		glm::vec3(0.0f, 1.0f, 0.0f),
-		glm::vec3(1.0f, -1.0f, -1.0f),
-		glm::vec3(-1.0f, -1.0f, -1.0f),
-
-		glm::vec3(0.0f, 1.0f, 0.0f),
-		glm::vec3(-1.0f, -1.0f, 1.0f),
-		glm::vec3(1.0f, -1.0f, 1.0f),
-
-		glm::vec3(0.0f, 1.0f, 0.0f),
-		glm::vec3(-1.0f, -1.0f, -1.0f),
-		glm::vec3(-1.0f, -1.0f, 1.0f),
-
-		glm::vec3(0.0f, 1.0f, 0.0f),
-		glm::vec3(1.0f, -1.0f, 1.0f),
-		glm::vec3(1.0f, -1.0f, -1.0f)
+	plainProg = new Program("plainvertex.glsl", "plainfrag.glsl");
+	glUseProgram(plainProg->progId);
+	setupLightBuffers(plainProg->progId);
+	plainProg->validate();
+
+	std::vector<std::string> faces = {
+		"models/skybox/right.jpg",
+		"models/skybox/left.jpg",
+		"models/skybox/top.jpg",
+		"models/skybox/bottom.jpg",
+		"models/skybox/front.jpg",
+		"models/skybox/back.jpg"
 	};
+	skybox = new Skybox(faces);
 
-	// work out the normals
-	glm::vec3 normals[12];
-	for (int i = 0; i < 4; i++) {
-		glm::vec3 a = vertices[i * 3];
-		glm::vec3 b = vertices[i * 3 + 1];
-		glm::vec3 c = vertices[i * 3 + 2];
-		glm::vec3 u = glm::normalize(a - c);
-	  	glm::vec3 v = glm::normalize(b - c);
-		glm::vec3 norm = glm::normalize(glm::cross(v, u));
-		for(int j = 0; j < 3; j++) {
-			normals[i * 3 + j] = glm::vec3(norm);
-		}
-	}
-
-	vaos = new GLuint[2];
+	textureProg = new Program("texturevertex.glsl", "texturefrag.glsl");
+	/* chest = new Model("models/chest.dae", *textureProg, *skybox); */
 
-	progId = compileShaders((char*)"vertex.glsl", (char*)"fragment.glsl");
-	glUseProgram(progId);
-	vaos[0] = setupBuffers(vertices, normals, progId);
-	validateProgram(progId);
+	mirrorCube = new Model("models/mirrorCube.dae", *textureProg, *skybox);
 
 	glEnable(GL_DEPTH_TEST); 
 	glEnable(GL_CULL_FACE); 
@@ -269,6 +193,13 @@ void timer(int _) {
 	if (keyStates['e'])
 		ySpeed = -0.1f;
 
+	if (keyStates['j']) lightPos.z += 0.1f;
+	if (keyStates['k']) lightPos.z -= 0.1f;
+	if (keyStates['h']) lightPos.x -= 0.1f;
+	if (keyStates['l']) lightPos.x += 0.1f;
+	if (keyStates['m']) lightPos.y -= 0.1f;
+	if (keyStates['n']) lightPos.y += 0.1f;
+
 	camPos.x += xSpeed * sin(yaw) + zSpeed * cos(yaw);
 	camPos.y += ySpeed;
 	camPos.z += zSpeed * sin(yaw) - xSpeed * cos(yaw);
@@ -299,6 +230,12 @@ 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);
+	}
 }
 
 void mouse(int button, int state, int x, int y) {
@@ -309,7 +246,7 @@ void mouse(int button, int state, int x, int y) {
 int main(int argc, char** argv) {
 	glutInit(&argc, argv);
 	glutInitDisplayMode(GLUT_DEPTH|GLUT_DOUBLE|GLUT_RGB|GLUT_3_2_CORE_PROFILE);
-	glutInitWindowSize(800, 600);
+	glutInitWindowSize(WIDTH, HEIGHT);
 	int win = glutCreateWindow("Hello Triangle");
 	glutDisplayFunc(display);