#include "ScanLine.h"

void Rasterizer::Move(double x, double y)
{
	x1 = x;
	y1 = y;
}

void Rasterizer::LineClip(double x1, double y1, double x2, double y2)
{
	if(y1 < cliprect.top) {
		if(y2 < cliprect.top)
			return;
		x1 = (x2 - x1) * (cliprect.top - y1) / (y2 - y1) + x1;
		y1 = cliprect.top;
	}
	else
	if(y1 > cliprect.bottom) {
		if(y2 > cliprect.bottom)
			return;
		x1 = (x2 - x1) * (cliprect.bottom - y1) / (y2 - y1) + x1;
		y1 = cliprect.bottom;			
	}
	if(y2 < cliprect.top) {
		x2 = (x2 - x1) * (cliprect.top - y1) / (y2 - y1) + x1;
		y2 = cliprect.top;
	}
	else
	if(y2 > cliprect.bottom) {
		x2 = (x2 - x1) * (cliprect.bottom - y1) / (y2 - y1) + x1;
		y2 = cliprect.bottom;
	}
/*
	if(x1 < cliprect.left) {
		if(x2 < cliprect.left)
			return;
		y1 = (y2 - y1) * (cliprect.left - x1) / (x2 - x1) + y1;
		x1 = cliprect.left;
	}
	else
	if(x1 > cliprect.right) {
		if(x2 > cliprect.right)
			return;
		y1 = (y2 - y1) * (cliprect.right - x1) / (x2 - x1) + y1;
		x1 = cliprect.right;
	}
	if(x2 < cliprect.left) {
		y2 = (y2 - y1) * (cliprect.left - x1) / (x2 - x1) + y1;
		x2 = cliprect.left;
	}
	else
	if(x2 > cliprect.right) {
		y2 = (y2 - y1) * (cliprect.right - x1) / (x2 - x1) + y1;
		x2 = cliprect.right;
	}
*/
	LineRaw(int(x1 * 256 + 0.5), int(y1 * 256 + 0.5), int(x2 * 256 + 0.5), int(y2 * 256 + 0.5));
}

void Rasterizer::Line(double x2, double y2)
{
	LineClip(x1, y1, x2, y2);
	x1 = x2;
	y1 = y2;
}