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#include "ball.h"
/// The constructor sets the radius and calls Reset() to start the ball at
/// the center of the field
Ball::Ball() : radius_(2.6f) {
Reset();
}
Ball::~Ball() {
Reset();
}
float Ball::radius() {
return radius_;
}
Point3 Ball::position() {
return position_;
}
void Ball::set_position(const Point3 &p) {
position_ = p;
}
Vector3 Ball::velocity() {
return velocity_;
}
void Ball::set_velocity(const Vector3 &v) {
velocity_ = v;
}
void Ball::Reset() {
position_ = Point3(0, radius_, 0);
float a = GfxMath::PI * rand()/RAND_MAX;
velocity_ = Vector3(25*cos(a), 10, 25*sin(a));
}
void Ball::Draw(QuickShapes quickShapes, Matrix4 modelMatrix, Matrix4 viewMatrix, Matrix4 projMatrix) {
Color ballcol(1,1,1);
Matrix4 Mball =
Matrix4::Translation(position_- Point3(0,0,0)) *
Matrix4::Scale(Vector3(radius_, radius_, radius_));
quickShapes.DrawSphere(modelMatrix * Mball, viewMatrix, projMatrix, ballcol);
// Draw the ball's shadow -- this is a bit of a hack, scaling Y by zero
// flattens the sphere into a pancake, which we then draw just a bit
// above the ground plane.
Color shadowcol(0.2f, 0.4f, 0.15f);
Matrix4 Mshadow =
Matrix4::Translation(Vector3(position_[0], -0.1f, position_[2])) *
Matrix4::Scale(Vector3(radius_, 0, radius_)) *
Matrix4::RotationX(90);
quickShapes.DrawSphere(modelMatrix * Mshadow, viewMatrix, projMatrix, shadowcol);
}
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