C++ (Cpp) Mat3::CreateScale Examples

Example #1

File: Sprite.cpp Project: Breadmouth/FirstYearProjects

void Sprite::Transform(const Mat3 &rhs)
{
	Vector3 topLeft(0 - m_anchor.x, 1 - m_anchor.y);
	Vector3 topRight(1 - m_anchor.x, 1 - m_anchor.y);
	Vector3 bottomLeft(0 - m_anchor.x, 0 - m_anchor.y);
	Vector3 bottomRight(1 - m_anchor.x, 0 - m_anchor.y);

	Mat3 scale = (scale.CreateScale( Vector3( (float)m_width, (float)m_height)));

	topLeft = rhs * (scale * topLeft);
	topRight = rhs * (scale * topRight);
	bottomLeft = rhs * (scale * bottomLeft);
	bottomRight = rhs * (scale * bottomRight);

	topLeft.x = ((2.0f / m_game->GetScreenWidth()) * topLeft.x) - 1.0f;
	topLeft.y = ((2.0f / m_game->GetScreenHeight()) * topLeft.y) - 1.0f;
	
	topRight.x = ((2.0f / m_game->GetScreenWidth()) * topRight.x) - 1.0f;
	topRight.y = ((2.0f / m_game->GetScreenHeight()) * topRight.y) - 1.0f;
	
	bottomLeft.x = ((2.0f / m_game->GetScreenWidth()) * bottomLeft.x) - 1.0f;
	bottomLeft.y = ((2.0f / m_game->GetScreenHeight()) * bottomLeft.y) - 1.0f;
	
	bottomRight.x = ((2.0f / m_game->GetScreenWidth()) * bottomRight.x) - 1.0f;
	bottomRight.y = ((2.0f / m_game->GetScreenHeight()) * bottomRight.y) - 1.0f;

	m_vertices[0].Positions[0] = topLeft.x;
	m_vertices[0].Positions[1] = topLeft.y;
	m_vertices[1].Positions[0] = topRight.x;
	m_vertices[1].Positions[1] = topRight.y;
	m_vertices[2].Positions[0] = bottomLeft.x;
	m_vertices[2].Positions[1] = bottomLeft.y;
	m_vertices[3].Positions[0] = bottomRight.x;
	m_vertices[3].Positions[1] = bottomRight.y;
}