|
|
using System;
|
|
|
using Microsoft.Xna.Framework;
|
|
|
using Microsoft.Xna.Framework.Graphics;
|
|
|
|
|
|
|
|
|
namespace isometricparkfna
|
|
|
{
|
|
|
public class Line
|
|
|
{
|
|
|
public static Texture2D PixelTexture;
|
|
|
public Line()
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
public static void drawLine(SpriteBatch batch, Vector2 start, Vector2 stop, Color color)
|
|
|
{
|
|
|
drawLine(batch, start, stop, color, 0, 1);
|
|
|
}
|
|
|
|
|
|
public static void drawLine(SpriteBatch batch, Vector2 start, Vector2 stop, Color color, float depth)
|
|
|
{
|
|
|
drawLine(batch, start, stop, color, depth, 1);
|
|
|
|
|
|
}
|
|
|
|
|
|
public static void drawLine(SpriteBatch batch, Vector2 start, Vector2 stop, Color color, float depth, int width)
|
|
|
{
|
|
|
Vector2 line = stop - start;
|
|
|
float angle = (float)Math.Atan2((double)line.Y, (double) line.X);
|
|
|
Rectangle rect = new Rectangle((int)start.X, (int)start.Y, (int)Math.Round(line.Length()), width);
|
|
|
batch.Draw(Line.PixelTexture, rect, null, color, angle, new Vector2(0,0), SpriteEffects.None, depth);
|
|
|
|
|
|
}
|
|
|
|
|
|
public static void initialize(GraphicsDevice graphics)
|
|
|
{
|
|
|
SpriteBatch spriteBatch = new SpriteBatch(graphics);
|
|
|
Line.PixelTexture = new Texture2D(graphics, 1, 1);
|
|
|
|
|
|
Line.PixelTexture.SetData<Color> (new Color[] { Color.White});
|
|
|
}
|
|
|
|
|
|
public static Vector2 departurePoint(Vector2 start, Vector2 stop, float width, float height)
|
|
|
{
|
|
|
if (MathUtils.BetweenExclusive(stop.X, 0, width ) && MathUtils.BetweenExclusive(stop.Y, 0, height)) {
|
|
|
return stop;
|
|
|
}
|
|
|
|
|
|
float slope = (start.Y - stop.Y) / (start.X - stop.X);
|
|
|
|
|
|
float intercept = (start.Y - (slope * start.X));
|
|
|
|
|
|
if (stop.X < 0) {
|
|
|
float newY = slope * 0 + intercept;
|
|
|
return new Vector2(0, newY);
|
|
|
}
|
|
|
else if (stop.Y < 0)
|
|
|
{
|
|
|
float newX = intercept / slope;
|
|
|
return new Vector2(newX, 0);
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (stop.Y > height)
|
|
|
{
|
|
|
float newX = (intercept + height) / slope;
|
|
|
return new Vector2(newX, height);
|
|
|
}
|
|
|
else if (stop.X > width)
|
|
|
{
|
|
|
float newY = slope * width + intercept;
|
|
|
return new Vector2(width, newY);
|
|
|
}
|
|
|
|
|
|
return stop;//TODO
|
|
|
|
|
|
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
