/// <summary>
/// Draws the arrow image extending from "from" along the "dir" direction
/// </summary>
/// <param name="from">beginning position of the vector</param>
/// <param name="dir">the direction of the vector</param>
static public void DrawPointVector(Vector2 from, Vector2 dir)
{
LoadImage();
float length = dir.Length();
float theta = 0f;
// compute the angle to rotate ...
if (length > 0.001f)
{
dir /= length;
theta = (float)Math.Acos((double)dir.X);
if (dir.X < 0.0f)
{
if (dir.Y > 0.0f)
{
theta = -theta;
}
}
else
{
if (dir.Y > 0.0f)
{
theta = -theta;
}
}
}
// Defines where and size of the texture to show
Vector2 size = new Vector2(length, kLenToWidthRatio * length);
Rectangle destRect = Camera.ComputePixelRectangle(from, size);
// destRect is computed with respect to the "from" position, on the left-side of the texture
// we only need to offse the reference in the y from top-left to middle-left
Vector2 org = new Vector2(0f, ShowVector.sImage.Height / 2f);
Game1.sSpriteBatch.Draw(ShowVector.sImage, destRect, null, Color.White,
theta, org, SpriteEffects.None, 0f);
String msg;
msg = "Direction=" + dir + "\nSize=" + length;
FontSupport.PrintStatusAt(from + (0.5f * length * dir), msg, Color.Black);
}
public override void Draw()
{
// Defines where and size of the texture to show
Rectangle destRect = Camera.ComputePixelRectangle(mPosition, mSize);
int imageTop = mCurrentRow * mSpriteImageHeight;
int imageLeft = mCurrentColumn * mSpriteImageWidth;
//PLS KILL ME
//Console.WriteLine(imageTop + " " + imageLeft);
// define the rotation origin
Vector2 org = new Vector2(mSpriteImageWidth / 2, mSpriteImageHeight / 2);
// define the area to be drawn
Rectangle srcRect = new Rectangle(
imageLeft + mPaddings,
imageTop + mPaddings,
mSpriteImageWidth, mSpriteImageHeight);
// Draw the texture
Game1.sSpriteBatch.Draw(mImage,
destRect, // Area to be drawn in pixel space
srcRect, // <<-- rect on the spriteSheet
Color.White, //
mRotateAngle, // Angle to roate (clockwise)
org, // Image reference position,
SpriteEffects, 0f);
//Game1.sSpriteBatch.Draw(mImage, destRect,srcRect, Color.White);
if (null != mLabelString)
{
FontSupport.PrintStatusAt(mPosition, mLabelString, mLabelColor);
}
}