Lab7 – CG 2016

Lab7-GeometryPositionColorSimpleCar (using Transformation matrix)

SimpleCar::SimpleCar()
{
angle = 0.0f; // 0~360
direction = 1.0f; // +/-1
position = glm::vec3(-3.0f, 0.0f, 0.0f);

init();
}

void SimpleCar::init()
{
body = Parallelepiped(glm::vec3(-1.0f, 0.0f, -1.0f), glm::vec3(2.0f, 0.0f, 0.0f), glm::vec3(0.0f, 0.0f, 2.0f), glm::vec3(0.0f, 1.0f, 0.0f));
body.setColor(glm::vec3(0.0f, 1.0f, 0.0f));
wheel[0] = Torus(glm::vec3(0.0f, 0.0f, .0f), 0.3f, 0.1f, 32, 16);
wheel[0].setColor(glm::vec3(1.0f, 0.0f, 0.0f));
wheel[1] = Torus(glm::vec3(0.0f, 0.0f, .0f), 0.3f, 0.1f, 32, 16);
wheel[1].setColor(glm::vec3(0.0f, 0.0f, 1.0f));

bodyTransform = glm::translate(glm::mat4(1.0f), position); // RHS x+ right
wheelTransform[0] = glm::translate(glm::mat4(1.0f), glm::vec3(-0.5f, 0.0f, -0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
wheelTransform[1] = glm::translate(glm::mat4(1.0f), glm::vec3(-0.5f, 0.0f, 0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
wheelTransform[2] = glm::translate(glm::mat4(1.0f), glm::vec3(0.5f, 0.0f, -0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
wheelTransform[3] = glm::translate(glm::mat4(1.0f), glm::vec3(0.5f, 0.0f, 0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
}

void SimpleCar::draw(Program* p, glm::mat4& projection, glm::mat4& view, glm::mat4& model)
{
p->useProgram();
p->setUniform(“gProjection”, projection);
p->setUniform(“gView”, view);

glm::mat4 carMatrix = model * bodyTransform;
p->setUniform(“gModel”, carMatrix);
body.draw();

glm::mat4 wheelMatrix = model * bodyTransform * wheelTransform[0];
p->setUniform(“gModel”, wheelMatrix);
wheel[0].draw();

wheelMatrix = model * bodyTransform * wheelTransform[1];
p->setUniform(“gModel”, wheelMatrix);
wheel[0].draw();

wheelMatrix = model * bodyTransform * wheelTransform[2];
p->setUniform(“gModel”, wheelMatrix);
wheel[1].draw();

wheelMatrix = model * bodyTransform * wheelTransform[3];
p->setUniform(“gModel”, wheelMatrix);
wheel[1].draw();
}

bool SimpleCar::update(float deltaTime)
{
angle = angle – 180.0f * (float) (deltaTime) * 0.001f * direction;
position[0] = position[0] + (float) (deltaTime) * 0.001f * direction;

//std::cout << “position[0]=” << position[0] << std::endl;
if (position[0] * direction > 3)
direction = -direction;

bodyTransform = glm::translate(glm::mat4(1.0f), position); // RHS x+ right
wheelTransform[0] = glm::translate(glm::mat4(1.0f), glm::vec3(-0.5f, 0.0f, -0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
wheelTransform[1] = glm::translate(glm::mat4(1.0f), glm::vec3(-0.5f, 0.0f, 0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
wheelTransform[2] = glm::translate(glm::mat4(1.0f), glm::vec3( 0.5f, 0.0f, -0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));
wheelTransform[3] = glm::translate(glm::mat4(1.0f), glm::vec3( 0.5f, 0.0f, 0.5f)) * glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 0.0f, 1.0f));

return true;
}