public static void update()
{
bool modified = false;
int camera_count = camera_transform_stack_count;
if (camera_transform_stack_modified)
{
modified = true;
camera_transform_stack_modified = false;
if (camera_count > 0)
{
int mpos = 0;
camera_transform = camera_transform_stack[0];
while (--camera_count > 0)
{
camera_transform = camera_transform.times(camera_transform_stack[++mpos]);
}
}
else
{
camera_transform = new Matrix2x3(1,0,0,0,1,0);
}
}
int object_count = object_transform_stack_count;
if (object_transform_stack_modified)
{
modified = true;
object_transform_stack_modified = false;
if (object_count > 0)
{
int mpos = object_count;
object_transform = object_transform_stack[--mpos];
while (--object_count > 0)
{
object_transform = object_transform.times( object_transform_stack[--mpos] );
}
}
else
{
object_transform = new Matrix2x3(1,0,0,0,1,0);
}
}
if (modified) transform = camera_transform.times( object_transform );
}
public static CompoundTransform create_from( ClassTransformManager obj,
CompoundVector2 size, CompoundVector2 handle,
CompoundRadians angle, CompoundVector2 scale,
CompoundVector2 position,
bool hflip, bool vflip)
{
double handle_x = handle.property_x;
double handle_y = handle.property_y;
double size_x = size.property_x;
double size_y = size.property_y;
double scale_x = scale.property_x;
double scale_y = scale.property_y;
if (hflip || vflip)
{
handle_x -= size_x / 2.0;
handle_y -= size_y / 2.0;
}
double cost = Math.Cos(angle.property_value);
double sint = Math.Sin(angle.property_value);
double r1c1 = cost*scale_x;
double r1c2 = -sint*scale_y;
double r1c3 = position.property_x - scale_x*handle_x*cost + sint*scale_y*handle_y;
double r2c1 = sint*scale_x;
double r2c2 = cost*scale_y;
double r2c3 = position.property_y - scale_x*handle_x*sint - cost*scale_y*handle_y;
Matrix2x3 m = new Matrix2x3(r1c1,r1c2,r1c3,r2c1,r2c2,r2c3);
if (hflip || vflip)
{
if (hflip)
{
if (vflip)
{
m = m.times( new Matrix2x3(-1,0,0,0,-1,0) );
}
else
{
m = m.times( new Matrix2x3(-1,0,0,0,1,0) );
}
}
else
{
m = m.times( new Matrix2x3(1,0,0,0,-1,0) );
}
// translate by -size/2
m = m.times( new Matrix2x3(1,0,-size_x/2.0,0,1,-size_y/2.0) );
}
return new CompoundTransform(
new CompoundTransformRow(m.r1c1,m.r1c2,m.r1c3),
new CompoundTransformRow(m.r2c1,m.r2c2,m.r2c3)
);
}