/*
Initial function, called before display
*/
void init(GLWrapper *glw)
{
printInstructions();
angle_x = 0.0f;
angle_x_inc = 0.0f;
angle_y = 0.0f;
angle_y_inc = 0.0f;
angle_z = 0.0f;
angle_z_inc = 0.1f;
scale_val = 1.0;
move_model_x = 0;
move_model_y = 0;
move_model_z = 0;
look_x = 0;
look_y = 0;
look_z = 0;
aspect_ratio = 1.3333f;
// Generate index (name) for one vertex array object
glGenVertexArrays(1, &vao);
// Create the vertex array object and make it current
glBindVertexArray(vao);
/* Define an array of colours */
float vertexColours[] = {
0.627f, 0.627f, 0.627f, 1.0f
};
/* Create vec4 arrays for each object and vec3 arrays to contain normals*/
Gear gear;
glm::vec4 * gearTest = gear.createGear(radius, sides, teeth, 0.195f, 0.0f);
glm::vec3 * gearOneNormal = gear.calculateNormals(gearTest, sides, teeth);
glm::vec4 * gearTwo = gear.createGear(0.3, 10, 5, 0.180f, 35.0f);
glm::vec3 * gearTwoNormal = gear.calculateNormals(gearTwo, 10, 5);
glm::vec4 * gearThree = gear.createGear(radius, sides, teeth, 0.195f, 24.0f);
glm::vec3 * gearThreeNormal = gear.calculateNormals(gearThree, sides, teeth);
glm::vec4 * gearFour = gear.createGear(1.0, 26, 16, 0.195f, 10.0f);
glm::vec3 * gearFourNormal = gear.calculateNormals(gearFour, 26, 20);
Crank crankClass;
glm::vec4 * crank = crankClass.buildCrank();
glm::vec3 * crankNormal = crankClass.calculateNormals(crank);
/* Create a vertex buffer object to store vertices */
glGenBuffers(1, &positionBufferGearOne);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferGearOne);
glBufferData(GL_ARRAY_BUFFER, (368 * sizeof(glm::vec4)), gearTest, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store normals */
glGenBuffers(1, &gearOneNormals);
glBindBuffer(GL_ARRAY_BUFFER, gearOneNormals);
glBufferData(GL_ARRAY_BUFFER, (368 * sizeof(glm::vec3)), gearOneNormal, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store vertices */
glGenBuffers(1, &positionBufferGearTwo);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferGearTwo);
glBufferData(GL_ARRAY_BUFFER, (368 * sizeof(glm::vec4)), gearTwo, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store normals */
glGenBuffers(1, &gearTwoNormals);
glBindBuffer(GL_ARRAY_BUFFER, gearTwoNormals);
glBufferData(GL_ARRAY_BUFFER, (368 * sizeof(glm::vec3)), gearTwoNormal, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store vertices */
glGenBuffers(1, &positionBufferGearThree);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferGearThree);
glBufferData(GL_ARRAY_BUFFER, (368 * sizeof(glm::vec4)), gearThree, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store normals */
glGenBuffers(1, &gearThreeNormals);
glBindBuffer(GL_ARRAY_BUFFER, gearThreeNormals);
glBufferData(GL_ARRAY_BUFFER, (368 * sizeof(glm::vec3)), gearThreeNormal, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store vertices */
glGenBuffers(1, &positionBufferGearFour);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferGearFour);
glBufferData(GL_ARRAY_BUFFER, (700 * sizeof(glm::vec4)), gearFour, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store normals */
glGenBuffers(1, &gearFourNormals);
glBindBuffer(GL_ARRAY_BUFFER, gearFourNormals);
glBufferData(GL_ARRAY_BUFFER, (700 * sizeof(glm::vec3)), gearFourNormal, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store vertices */
glGenBuffers(1, &positionBufferCrank);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferCrank);
glBufferData(GL_ARRAY_BUFFER, (72 * sizeof(glm::vec4)), crank, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store normals */
glGenBuffers(1, &crankNormals);
glBindBuffer(GL_ARRAY_BUFFER, crankNormals);
glBufferData(GL_ARRAY_BUFFER, (72 * sizeof(glm::vec3)), crankNormal, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/* Create a vertex buffer object to store vertex colours */
glGenBuffers(1, &colourObject);
glBindBuffer(GL_ARRAY_BUFFER, colourObject);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertexColours), vertexColours, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
try
{
program = glw->LoadShader("lab2.vert", "lab2.frag");
}
catch (std::exception &e)
{
std::cout << "Caught exception: " << e.what() << std::endl;
std::cin.ignore();
exit(0);
}
/* Define uniforms to send to vertex shader */
modelID = glGetUniformLocation(program, "model");
viewID = glGetUniformLocation(program, "view");
projectionID = glGetUniformLocation(program, "projection");
}
