public void drawArrow(Vector2 start, Vector2 end, float length, float width, bool drawStartIndicator, Color color)
{
// Draw connection segment between start- and end-point
//drawLine( start, end, color );
// Precalculate halfwidth
var halfWidth = width / 2;
// Create directional reference
Vector2 rotation = (start - end);
rotation.Normalize();
// Calculate angle of directional vector
float angle = (float)Math.Atan2(rotation.X, -rotation.Y);
// Create matrix for rotation
Matrix2D rotMatrix = Matrix2D.createRotation(angle);
// Create translation matrix for end-point
Matrix2D endMatrix = Matrix2D.createTranslation(end.X, end.Y);
// Setup arrow end shape
Vector2[] verts = new Vector2[3];
verts[0] = new Vector2(0, 0);
verts[1] = new Vector2(-halfWidth, -length);
verts[2] = new Vector2(halfWidth, -length);
// Rotate end shape
Vector2Ext.transform(verts, ref rotMatrix, verts);
// Translate end shape
Vector2Ext.transform(verts, ref endMatrix, verts);
// Draw arrow end shape
drawPolygon(verts, 3, color);
if (drawStartIndicator)
{
// Create translation matrix for start
Matrix2D startMatrix = Matrix2D.createTranslation(start.X, start.Y);
// Setup arrow start shape
Vector2[] baseVerts = new Vector2[4];
baseVerts[0] = new Vector2(-halfWidth, length / 4);
baseVerts[1] = new Vector2(halfWidth, length / 4);
baseVerts[2] = new Vector2(halfWidth, 0);
baseVerts[3] = new Vector2(-halfWidth, 0);
// Rotate start shape
Vector2Ext.transform(baseVerts, ref rotMatrix, baseVerts);
// Translate start shape
Vector2Ext.transform(baseVerts, ref startMatrix, baseVerts);
// Draw start shape
drawPolygon(baseVerts, 4, color);
}
}
public void calculateBounds(Vector2 parentPosition, Vector2 position, Vector2 origin, Vector2 scale, float rotation, float width, float height)
{
if (rotation == 0f)
{
x = parentPosition.X + position.X - origin.X * scale.X;
y = parentPosition.Y + position.Y - origin.Y * scale.Y;
this.width = width * scale.X;
this.height = height * scale.Y;
}
else
{
// special care for rotated bounds. we need to find our absolute min/max values and create the bounds from that
var worldPosX = parentPosition.X + position.X;
var worldPosY = parentPosition.Y + position.Y;
Matrix2D tempMat;
// set the reference point to world reference taking origin into account
var transformMatrix = Matrix2D.createTranslation(-worldPosX - origin.X, -worldPosY - origin.Y);
Matrix2D.createScale(scale.X, scale.Y, out tempMat); // scale ->
Matrix2D.multiply(ref transformMatrix, ref tempMat, out transformMatrix);
Matrix2D.createRotation(rotation, out tempMat); // rotate ->
Matrix2D.multiply(ref transformMatrix, ref tempMat, out transformMatrix);
Matrix2D.createTranslation(worldPosX, worldPosY, out tempMat); // translate back
Matrix2D.multiply(ref transformMatrix, ref tempMat, out transformMatrix);
// TODO: this is a bit silly. we can just leave the worldPos translation in the Matrix and avoid this
// get all four corners in world space
var topLeft = new Vector2(worldPosX, worldPosY);
var topRight = new Vector2(worldPosX + width, worldPosY);
var bottomLeft = new Vector2(worldPosX, worldPosY + height);
var bottomRight = new Vector2(worldPosX + width, worldPosY + height);
// transform the corners into our work space
Vector2Ext.transform(ref topLeft, ref transformMatrix, out topLeft);
Vector2Ext.transform(ref topRight, ref transformMatrix, out topRight);
Vector2Ext.transform(ref bottomLeft, ref transformMatrix, out bottomLeft);
Vector2Ext.transform(ref bottomRight, ref transformMatrix, out bottomRight);
// find the min and max values so we can concoct our bounding box
var minX = Mathf.minOf(topLeft.X, bottomRight.X, topRight.X, bottomLeft.X);
var maxX = Mathf.maxOf(topLeft.X, bottomRight.X, topRight.X, bottomLeft.X);
var minY = Mathf.minOf(topLeft.Y, bottomRight.Y, topRight.Y, bottomLeft.Y);
var maxY = Mathf.maxOf(topLeft.Y, bottomRight.Y, topRight.Y, bottomLeft.Y);
location = new Vector2(minX, minY);
this.width = maxX - minX;
this.height = maxY - minY;
}
}
public void drawInto(
Batcher batcher,
ref FontCharacterSource text,
Vector2 position,
Color color,
float rotation,
Vector2 origin,
Vector2 scale,
SpriteEffects effect,
float depth)
{
var flipAdjustment = Vector2.Zero;
var flippedVert = (effect & SpriteEffects.FlipVertically) == SpriteEffects.FlipVertically;
var flippedHorz = (effect & SpriteEffects.FlipHorizontally) == SpriteEffects.FlipHorizontally;
if (flippedVert || flippedHorz)
{
Vector2 size;
measureString(ref text, out size);
if (flippedHorz)
{
origin.X *= -1;
flipAdjustment.X = -size.X;
}
if (flippedVert)
{
origin.Y *= -1;
flipAdjustment.Y = _font.LineSpacing - size.Y;
}
}
// TODO: This looks excessive... i suspect we could do most of this with simple vector math and avoid this much matrix work.
var requiresTransformation = flippedHorz || flippedVert || rotation != 0f || scale != Vector2.One;
if (requiresTransformation)
{
Matrix2D temp;
Matrix2D.createTranslation(-origin.X, -origin.Y, out _transformationMatrix);
Matrix2D.createScale(flippedHorz ? -scale.X : scale.X, flippedVert ? -scale.Y : scale.Y, out temp);
Matrix2D.multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
Matrix2D.createTranslation(flipAdjustment.X, flipAdjustment.Y, out temp);
Matrix2D.multiply(ref temp, ref _transformationMatrix, out _transformationMatrix);
Matrix2D.createRotation(rotation, out temp);
Matrix2D.multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
Matrix2D.createTranslation(position.X, position.Y, out temp);
Matrix2D.multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
}
// Get the default glyph here once.
SpriteFont.Glyph?defaultGlyph = null;
if (_font.DefaultCharacter.HasValue)
{
defaultGlyph = _glyphs[_font.DefaultCharacter.Value];
}
var currentGlyph = SpriteFont.Glyph.Empty;
var offset = requiresTransformation ? Vector2.Zero : position - origin;
var firstGlyphOfLine = true;
for (var i = 0; i < text.Length; ++i)
{
var c = text[i];
if (c == '\r')
{
continue;
}
if (c == '\n')
{
offset.X = requiresTransformation ? 0f : position.X - origin.X;
offset.Y += _font.LineSpacing;
firstGlyphOfLine = true;
continue;
}
if (!_glyphs.TryGetValue(c, out currentGlyph))
{
if (!defaultGlyph.HasValue)
{
throw new ArgumentException("Errors.TextContainsUnresolvableCharacters", "text");
}
currentGlyph = defaultGlyph.Value;
}
// The first character on a line might have a negative left side bearing.
// In this scenario, SpriteBatch/SpriteFont normally offset the text to the right,
// so that text does not hang off the left side of its rectangle.
if (firstGlyphOfLine)
{
offset.X += Math.Max(currentGlyph.LeftSideBearing, 0);
firstGlyphOfLine = false;
}
else
{
offset.X += _font.Spacing + currentGlyph.LeftSideBearing;
}
var p = offset;
if (flippedHorz)
{
p.X += currentGlyph.BoundsInTexture.Width;
}
p.X += currentGlyph.Cropping.X;
if (flippedVert)
{
p.Y += currentGlyph.BoundsInTexture.Height - _font.LineSpacing;
}
p.Y += currentGlyph.Cropping.Y;
// transform our point if we need to
if (requiresTransformation)
{
Vector2Ext.transform(ref p, ref _transformationMatrix, out p);
}
var destRect = RectangleExt.fromFloats(
p.X,
p.Y,
currentGlyph.BoundsInTexture.Width * scale.X,
currentGlyph.BoundsInTexture.Height * scale.Y);
batcher.draw(
_font.Texture,
destRect,
currentGlyph.BoundsInTexture,
color,
rotation,
Vector2.Zero,
effect,
depth);
offset.X += currentGlyph.Width + currentGlyph.RightSideBearing;
}
}
/// <summary>
/// compiles the text into raw verts/texture coordinates. This method must be called anytime text or any other properties are
/// changed.
/// </summary>
public void compile()
{
_charDetails = new CharDetails[_text.Length];
Character currentCharacter = null;
var effects = (byte)SpriteEffects.None;
var _transformationMatrix = Matrix2D.identity;
var requiresTransformation = rotation != 0f || _scale != Vector2.One;
if (requiresTransformation)
{
Matrix2D temp;
Matrix2D.createTranslation(-_origin.X, -_origin.Y, out _transformationMatrix);
Matrix2D.createScale(_scale.X, _scale.Y, out temp);
Matrix2D.multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
Matrix2D.createRotation(rotation, out temp);
Matrix2D.multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
Matrix2D.createTranslation(position.X, position.Y, out temp);
Matrix2D.multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
}
var offset = requiresTransformation ? Vector2.Zero : position - _origin;
for (var i = 0; i < _text.Length; ++i)
{
_charDetails[i].initialize();
_charDetails[i].color = _color;
var c = _text[i];
if (c == '\n')
{
offset.X = requiresTransformation ? 0f : position.X - _origin.X;
offset.Y += _font.lineHeight;
currentCharacter = null;
continue;
}
if (currentCharacter != null)
{
offset.X += _font.spacing.X + currentCharacter.xAdvance;
}
currentCharacter = _font[c];
var p = offset;
p.X += currentCharacter.offset.X;
p.Y += currentCharacter.offset.Y;
// transform our point if we need to
if (requiresTransformation)
{
Vector2Ext.transform(ref p, ref _transformationMatrix, out p);
}
var destination = new Vector4(p.X, p.Y, currentCharacter.bounds.Width * _scale.X, currentCharacter.bounds.Height * _scale.Y);
_charDetails[i].texture = _font.textures[_font[currentCharacter.character].texturePage];
//_charDetails[i].texture = currentCharacter.subtexture.texture2D;
// Batcher calculations
var sourceRectangle = currentCharacter.bounds;
float sourceX, sourceY, sourceW, sourceH;
var destW = destination.Z;
var destH = destination.W;
// calculate uvs
var inverseTexW = 1.0f / (float)currentCharacter.bounds.Width;
var inverseTexH = 1.0f / (float)currentCharacter.bounds.Height;
sourceX = sourceRectangle.X * inverseTexW;
sourceY = sourceRectangle.Y * inverseTexH;
sourceW = Math.Max(sourceRectangle.Width, float.Epsilon) * inverseTexW;
sourceH = Math.Max(sourceRectangle.Height, float.Epsilon) * inverseTexH;
// Rotation Calculations
float rotationMatrix1X;
float rotationMatrix1Y;
float rotationMatrix2X;
float rotationMatrix2Y;
if (!Mathf.withinEpsilon(rotation, 0.0f))
{
var sin = Mathf.sin(rotation);
var cos = Mathf.cos(rotation);
rotationMatrix1X = cos;
rotationMatrix1Y = sin;
rotationMatrix2X = -sin;
rotationMatrix2Y = cos;
}
else
{
rotationMatrix1X = 1.0f;
rotationMatrix1Y = 0.0f;
rotationMatrix2X = 0.0f;
rotationMatrix2Y = 1.0f;
}
// Calculate vertices, finally.
// top-left
_charDetails[i].verts[0].X = rotationMatrix2X + rotationMatrix1X + destination.X - 1;
_charDetails[i].verts[0].Y = rotationMatrix2Y + rotationMatrix1Y + destination.Y - 1;
// top-right
var cornerX = _cornerOffsetX[1] * destW;
var cornerY = _cornerOffsetY[1] * destH;
_charDetails[i].verts[1].X = (
(rotationMatrix2X * cornerY) +
(rotationMatrix1X * cornerX) +
destination.X
);
_charDetails[i].verts[1].Y = (
(rotationMatrix2Y * cornerY) +
(rotationMatrix1Y * cornerX) +
destination.Y
);
// bottom-left
cornerX = _cornerOffsetX[2] * destW;
cornerY = _cornerOffsetY[2] * destH;
_charDetails[i].verts[2].X = (
(rotationMatrix2X * cornerY) +
(rotationMatrix1X * cornerX) +
destination.X
);
_charDetails[i].verts[2].Y = (
(rotationMatrix2Y * cornerY) +
(rotationMatrix1Y * cornerX) +
destination.Y
);
// bottom-right
cornerX = _cornerOffsetX[3] * destW;
cornerY = _cornerOffsetY[3] * destH;
_charDetails[i].verts[3].X = (
(rotationMatrix2X * cornerY) +
(rotationMatrix1X * cornerX) +
destination.X
);
_charDetails[i].verts[3].Y = (
(rotationMatrix2Y * cornerY) +
(rotationMatrix1Y * cornerX) +
destination.Y
);
// texture coordintes
_charDetails[i].texCoords[0].X = (_cornerOffsetX[0 ^ effects] * sourceW) + sourceX;
_charDetails[i].texCoords[0].Y = (_cornerOffsetY[0 ^ effects] * sourceH) + sourceY;
_charDetails[i].texCoords[1].X = (_cornerOffsetX[1 ^ effects] * sourceW) + sourceX;
_charDetails[i].texCoords[1].Y = (_cornerOffsetY[1 ^ effects] * sourceH) + sourceY;
_charDetails[i].texCoords[2].X = (_cornerOffsetX[2 ^ effects] * sourceW) + sourceX;
_charDetails[i].texCoords[2].Y = (_cornerOffsetY[2 ^ effects] * sourceH) + sourceY;
_charDetails[i].texCoords[3].X = (_cornerOffsetX[3 ^ effects] * sourceW) + sourceX;
_charDetails[i].texCoords[3].Y = (_cornerOffsetY[3 ^ effects] * sourceH) + sourceY;
}
}