add class for model parts

CMakeLists.txt

@@ -9,6 +9,6 @@ find_package( glm REQUIRED )
 find_package( FreeGLUT REQUIRED )
 include_directories( ${OpenCV_INCLUDE_DIRS} )
 include_directories( ${PROJECT_SOURCE_DIR}/src )
-add_executable( fc2d src/main.cpp src/graphics.cpp )
+add_executable( fc2d src/main.cpp src/graphics.cpp src/modelpart.cpp )
 target_link_libraries( fc2d ${OpenCV_LIBS} -lOpenGL -lglut -lGLEW )
 set( CMAKE_BUILD_TYPE Debug )

src/graphics.cpp

@@ -10,33 +10,20 @@
 #include <iostream>
 
 #include <graphics.hpp>
-
-//VAOs for different parts
-//TODO: make this more modular
-GLuint head;	//head object
-GLuint face;	//face object
+#include <modelpart.hpp>
 
 GLuint shader;	//standard shader program used for all elements
 GLuint transUniform;	//location of the "transMatrix" transformation matrix uniform in the shader
 
-GLuint texHead;	//head texture
-GLuint texFace;	//face texture
-
-glm::mat4 matHead(1.0f);	//transformation matrix for head object
-glm::mat4 matFace(1.0f);	//transformation matrix for face object
+//parts of the model (see modelpart.hpp)
+ModelPart parts[2];
 
 void display () {
 	glClear(GL_COLOR_BUFFER_BIT);
 
-	glBindVertexArray(head);
-	glBindTexture(GL_TEXTURE_2D, texHead);
-	glUniformMatrix4fv(transUniform, 1, GL_FALSE, glm::value_ptr(matHead));
-	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
-
-	glBindVertexArray(face);
-	glBindTexture(GL_TEXTURE_2D, texFace);
-	glUniformMatrix4fv(transUniform, 1, GL_FALSE, glm::value_ptr(matFace));
-	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+	for (int i = 0; i < sizeof(parts)/sizeof(ModelPart); i++) {
+		parts[i].bindAndDraw();
+	}
 
 	glutSwapBuffers();
 }
@@ -77,8 +64,6 @@ void initBuffers (GLuint* vaoNum) {
 	GLuint uvAttr = glGetAttribLocation(shader, "texcoord");
 	glVertexAttribPointer(uvAttr, 2, GL_FLOAT, GL_FALSE, 4*sizeof(GLfloat), (void*)(2*sizeof(GLfloat)));
 	glEnableVertexAttribArray(uvAttr);
-
-
 }
 
 void initGraphics () {
@@ -88,24 +73,24 @@ void initGraphics () {
 	glutInit(&argc, argv);
 	glutCreateWindow("FaceCam2D");
 	glutInitWindowSize(512, 512);
-	glutDisplayFunc(display);
-
 	glewInit();
 
 	initShader();
 
-	initBuffers(&head);
-	initBuffers(&face);
+	parts[0] = ModelPart("head-base.png", transUniform);
+	parts[1] = ModelPart("head-face.png", transUniform);
 
-	initTexture(&texHead, "head-base.png");
-	initTexture(&texFace, "head-face.png");
-	
 	//enable blending for alpha textures
 	glEnable(GL_BLEND);
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
 	//set background color
 	glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
+
+	glutDisplayFunc(display);
+
+
+	std::cout << "graphics init complete" << std::endl;
 }
 
 void initTexture (GLuint* texNum, const char* path) {
@@ -190,8 +175,8 @@ void initModel () {
 
 void updateModel(glm::vec2 headPos, glm::vec2 facePos) {
 	//calculate transforms
-	matHead = glm::translate(glm::mat4(1.0f), glm::vec3(headPos.x, -headPos.y, 0.0f));
-	matFace = glm::translate(glm::mat4(1.0f), glm::vec3(facePos.x, -facePos.y, 0.0f));
+	parts[0].setPosition(headPos);
+	parts[1].setPosition(facePos);
 
 	//tell FreeGLUT to schedule a screen update
 	glutPostRedisplay();

src/graphics.hpp

@@ -8,6 +8,8 @@ void initGraphics ();
 
 void graphicsFrame ();
 
+void initBuffers (GLuint* vaoNum);
+
 void initTexture (GLuint* texNum, const char* path);
 
 void initShader();

src/modelpart.cpp

@@ -0,0 +1,31 @@
+#include <GL/glew.h>
+#include <glm/mat4x4.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+#include <graphics.hpp>
+#include <modelpart.hpp>
+
+#include <iostream>
+
+ModelPart::ModelPart() {
+}
+
+ModelPart::ModelPart(const char* texPath, GLuint transUniformNum) {
+	//create vbo, ebo, vao
+	initBuffers(&vao);
+	//create texture
+	initTexture(&tex, texPath);
+
+	transUniform = transUniformNum;
+}
+
+void ModelPart::bindAndDraw() {
+	glBindVertexArray(vao);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glUniformMatrix4fv(transUniform, 1, GL_FALSE, glm::value_ptr(transMatrix));
+	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+}
+
+void ModelPart::setPosition(glm::vec2 position) {
+	transMatrix = glm::translate(glm::mat4(1.0f), glm::vec3(position.x, position.y, 0.0f));
+}

src/modelpart.hpp

@@ -0,0 +1,20 @@
+#ifndef MODELPART_HPP
+#define MODELPART_HPP
+
+#include <glm/ext/matrix_transform.hpp>
+
+class ModelPart {
+	GLuint vao, tex, transUniform;
+	glm::mat4 transMatrix = glm::mat4(1.0f);
+	
+	public:
+		ModelPart();
+
+		ModelPart(const char* texPath, GLuint transUniformNum);
+
+		void bindAndDraw();
+
+		void setPosition(glm::vec2 position);
+};
+
+#endif