int main() {
// Since we use the ‘smooth’ animation algorithm, we must register it.
motive::SmoothInit::Register();
// The engine is the central place for animation data.
motive::MotiveEngine engine;
// In this example, we animate a one-dimensional floating point value.
motive::Motivator1f facing_angle;
// Initialize facing_angle Motivator to animate as a 'Smooth' Motivator.
// Alternatively, we could initialize as an 'Overshoot' Motivator. All
// Motivator types have the same interface. Internally, they are animated
// with different algorithms, and they will move differently towards their
// targets. However, to switch between Motivator types it is a simple matter
// of initializing with a different kind of MotiveInit struct.
//
// Angles wrap around with modular arithmetic. That is, -pi is equivalent to
// pi. Valid range for angles is -pi..pi, inclusive of +pi and exclusive of
// -pi.
const motive::SmoothInit init(Range(-kPi, kPi), true);
facing_angle.Initialize(init, &engine);
// Set initial state of the Motivator, and the target parameters.
// 'Smooth' Motivators animate to a target-value in a target-time. Not all
// types of Motivators use all target data.
const Angle start = Angle::FromDegrees(120.0f);
const float start_angular_velocity = 0.0f;
const Angle target = Angle::FromDegrees(-120.0f);
const float target_angular_velocity = 0.0f;
const motive::MotiveTime target_time = 100;
const motive::MotiveTime delta_time = 1;
facing_angle.SetTarget(
motive::CurrentToTarget1f(start.ToRadians(), start_angular_velocity,
target.ToRadians(), target_angular_velocity,
target_time));
std::vector<vec2> points(target_time / delta_time + 1);
for (motive::MotiveTime t = 0; t <= target_time; t += delta_time) {
// All Motivators created with 'engine' are animated here.
engine.AdvanceFrame(delta_time);
// The current value of the variable being animated is always available.
const Angle angle_at_t = Angle::FromWithinThreePi(facing_angle.Value());
points.push_back(
vec2(static_cast<float>(t), angle_at_t.ToDegrees()));
}
printf("\n%s", Graph2DPoints(&points[0], points.size()).c_str());
return 0;
}
int main() {
// Since we will be using the ‘smooth’ animation algorithm, we must register it
// with the engine.
motive::SmoothInit::Register();
// The engine is the central place where animation data is stored and processed.
motive::MotiveEngine engine;
// In this example, we animate a one-dimensional floating point value.
// It's also possible to animate a mathfu::vec2 with motive::Motivator2f, and
// similarly for higher dimensional vectors. We can even animate a mathfu::mat4
// (a 4x4 matrix) with motive::MotivatorMatrix4f.
//
// If you have your own math library, you can also animate those instead of
// mathfu types. See [Using Your Own Math Types][].
motive::Motivator1f facing_angle;
// Initialize facing_angle Motivator to animate as a 'Smooth' Motivator.
// Alternatively, we could initialize as an 'Overshoot' Motivator. All
// Motivator types have the same interface. Internally, they are animated
// with different algorithms, and they will move differently towards their
// targets. However, to switch between Motivator types it is a simple matter
// of initializing with a different kind of MotiveInit struct.
//
// Angles wrap around with modular arithmetic. That is, -pi is equivalent to
// pi. Valid range for angles is -pi..pi, inclusive of +pi and exclusive of
// -pi.
const motive::SmoothInit init(Range(-kPi, kPi), true);
facing_angle.Initialize(init, &engine);
// Set initial state of the Motivator, and the target parameters.
// 'Smooth' Motivators animate to a target-value in a target-time. Not all
// types of Motivators use all target data.
const Angle start = Angle::FromDegrees(120.0f);
const float start_angular_velocity = 0.0f;
const Angle target = Angle::FromDegrees(-120.0f);
const float target_angular_velocity = 0.0f;
const motive::MotiveTime target_time = 100;
const motive::MotiveTime delta_time = 1;
facing_angle.SetTarget(
motive::CurrentToTarget1f(start.ToRadians(), start_angular_velocity,
target.ToRadians(), target_angular_velocity,
target_time));
std::vector<vec2> points(target_time / delta_time + 1);
for (motive::MotiveTime t = 0; t <= target_time; t += delta_time) {
// That is, all Motivators created with 'engine' are animated here.
engine.AdvanceFrame(delta_time);
// The current value of the variable being animated is always available.
// Additionally, we can also access facing_angle.Velocity() for the angular
// velocity.
const Angle facing_angle_at_time_t(facing_angle.Value());
points.push_back(
vec2(static_cast<float>(t), facing_angle_at_time_t.ToDegrees()));
}
printf("\n%s", Graph2DPoints(&points[0], points.size()).c_str());
return 0;
}
void Ball::Update()
{
Vector2* prevPosition = new Vector2(ballPosition->X, ballPosition->Y);
Vector2* v = new Vector2( ballDirection->ToDegrees() );
v->Multiply( ballVelocity );
ballPosition->Add( v );
delete v;
if( ballPosition->X < gameArena->Player1WallX )
{
ballPosition->X = gameArena->Player1WallX - (ballPosition->X - gameArena->Player1WallX);
if( ballDirection->ToDegrees() < 180.0f )
{
ballDirection->Add( ballDirection->ShortestAngleTo(90.0f) * -2.0f );
} else {
ballDirection->Add( (270.0f - ballDirection->ToDegrees()) * 2.0f );
}
// Hurt Player 1
if( gameArena->Player1 != 0 )
{
gameArena->Player1->TakeDamage( 2 );
}
}
if( ballPosition->X >= gameArena->Player2WallX )
{
ballPosition->X -= ballPosition->X - gameArena->Player2WallX;
if( ballDirection->ToDegrees() > 270.0f )
{
ballDirection->Add( ballDirection->ShortestAngleTo(270.0f) * -2.0f );
} else {
ballDirection->Add( 180.0f - (ballDirection->ToDegrees() * 2.0f) );
}
// Hurt player 2
if( gameArena->Player2 != 0 )
{
gameArena->Player2->TakeDamage( 2 );
}
}
if( ballPosition->Y < gameArena->RoofY )
{
ballPosition->Y = gameArena->RoofY - (ballPosition->Y - gameArena->RoofY);
if( ballDirection->ToDegrees() < 270.0f )
{
ballDirection->Add( ballDirection->ShortestAngleTo(180.0f) * -2.0f );
} else {
ballDirection->Add( (360.0f - ballDirection->ToDegrees()) * 2.0f );
}
}
if( ballPosition->Y >= gameArena->FloorY )
{
ballPosition->Y -= ballPosition->Y - gameArena->FloorY;
if( ballDirection->ToDegrees() > 90.0f )
{
ballDirection->Add( ballDirection->ShortestAngleTo(180.0f) * 2.0f );
} else {
ballDirection->Add( 360.0f - (ballDirection->ToDegrees() * 2.0f) );
}
}
// Check collisions with players
Line* ballPath = new Line( prevPosition, ballPosition );
Line* pArea = 0;
bool ballAdjustXLeft;
if( ballDirection->ToDegrees() > 90.0f && ballDirection->ToDegrees() < 270.0f && gameArena->Player1 != 0 )
{
ballPath->Points[0]->X -= ballRadius;
ballPath->Points[1]->X -= ballRadius;
ballAdjustXLeft = true;
pArea = gameArena->Player1->GetCollisionLine();
}
if( (ballDirection->ToDegrees() < 90.0f || ballDirection->ToDegrees() > 270.0f) && gameArena->Player2 != 0 )
{
ballPath->Points[0]->X += ballRadius;
ballPath->Points[1]->X += ballRadius;
ballAdjustXLeft = false;
pArea = gameArena->Player2->GetCollisionLine();
}
if( pArea != 0 )
{
Vector2* pContact = ballPath->GetIntersection( pArea );
if( pContact != 0 )
{
/*
if( ballDirection->ToDegrees() < 180.0f && ballDirection->ToDegrees() > 90.0f )
{
ballDirection->Add( ballDirection->ShortestAngleTo(90.0f) * -2.0f );
ballPosition->X += (pContact->X - ballPosition->X) * 2.0f;
} else if( ballDirection->ToDegrees() >= 180.0f && ballDirection->ToDegrees() < 270.0f ) {
ballDirection->Add( (270.0f - ballDirection->ToDegrees()) * 2.0f );
ballPosition->X += (pContact->X - ballPosition->X) * 2.0f;
} else if( ballDirection->ToDegrees() > 270.0f ) {
ballDirection->Add( ballDirection->ShortestAngleTo(270.0f) * -2.0f );
ballPosition->X -= (ballPosition->X - pContact->X) * 2.0f;
} else if( ballDirection->ToDegrees() < 90.0f ) {
ballDirection->Add( 180.0f - (ballDirection->ToDegrees() * 2.0f) );
ballPosition->X -= (ballPosition->X - pContact->X) * 2.0f;
}
*/
Angle* a = pArea->Reflection( ballPath );
ballDirection->Set( a->ToDegrees() );
ballPosition->X += (!ballAdjustXLeft ? (pContact->X - ballRadius - ballPosition->X) * 2.0f : (ballPosition->X - ballRadius - pContact->X) * -2.0f);
delete a;
}
}
delete pArea;
delete ballPath;
delete prevPosition;
}