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;
// set the reference point to world reference taking origin into account
Matrix2D.createTranslation(-worldPosX - origin.X, -worldPosY - origin.Y, out _transformMat);
Matrix2D.createScale(scale.X, scale.Y, out _tempMat); // scale ->
Matrix2D.multiply(ref _transformMat, ref _tempMat, out _transformMat);
Matrix2D.createRotation(rotation, out _tempMat); // rotate ->
Matrix2D.multiply(ref _transformMat, ref _tempMat, out _transformMat);
Matrix2D.createTranslation(worldPosX, worldPosY, out _tempMat); // translate back
Matrix2D.multiply(ref _transformMat, ref _tempMat, out _transformMat);
// 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 _transformMat, out topLeft);
Vector2Ext.transform(ref topRight, ref _transformMat, out topRight);
Vector2Ext.transform(ref bottomLeft, ref _transformMat, out bottomLeft);
Vector2Ext.transform(ref bottomRight, ref _transformMat, 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 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.CreateRotationZ(angle);
// Create translation matrix for end-point
Matrix2D endMatrix = Matrix2D.CreateTranslation(end.X, end.Y, 0);
// 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, 0);
// 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 static void CalculateBounds(ref Rectangle rect, Vector2 parentPosition, Vector2 position, Vector2 origin,
Vector2 scale, float rotation, float width, float height)
{
if (rotation == 0f)
{
rect.X = (int)(parentPosition.X + position.X - origin.X * scale.X);
rect.Y = (int)(parentPosition.Y + position.Y - origin.Y * scale.Y);
rect.Width = (int)(width * scale.X);
rect.Height = (int)(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 = (int)Mathf.MinOf(topLeft.X, bottomRight.X, topRight.X, bottomLeft.X);
var maxX = (int)Mathf.MaxOf(topLeft.X, bottomRight.X, topRight.X, bottomLeft.X);
var minY = (int)Mathf.MinOf(topLeft.Y, bottomRight.Y, topRight.Y, bottomLeft.Y);
var maxY = (int)Mathf.MaxOf(topLeft.Y, bottomRight.Y, topRight.Y, bottomLeft.Y);
rect.Location = new Point(minX, minY);
rect.Width = (int)(maxX - minX);
rect.Height = (int)(maxY - minY);
}
}
public static void DrawHollowRect(this Batcher batcher, float x, float y, float width, float height,
Color color, float thickness = 1)
{
var tl = Vector2Ext.Round(new Vector2(x, y));
var tr = Vector2Ext.Round(new Vector2(x + width, y));
var br = Vector2Ext.Round(new Vector2(x + width, y + height));
var bl = Vector2Ext.Round(new Vector2(x, y + height));
batcher.SetIgnoreRoundingDestinations(true);
batcher.DrawLine(tl, tr, color, thickness);
batcher.DrawLine(tr, br, color, thickness);
batcher.DrawLine(br, bl, color, thickness);
batcher.DrawLine(bl, tl, color, thickness);
batcher.SetIgnoreRoundingDestinations(false);
}
public void setFusedData(bool shouldFuseBottom, ref Segment segment)
{
// store the angle off for later. For extreme angles we add extra verts to smooth the joint
angle = Vector2Ext.angle(segment.point.position - point.position, nextPoint.position - point.position);
this.shouldFuseBottom = shouldFuseBottom;
if (shouldFuseBottom)
{
hasFusedPoint = ShapeCollisions.lineToLine(segment.bl, segment.br, bl, br, out fusedPoint);
}
else
{
hasFusedPoint = ShapeCollisions.lineToLine(segment.tl, segment.tr, tl, tr, out fusedPoint);
}
}
public void SetFusedData(bool shouldFuseBottom, ref Segment segment)
{
// store the angle off for later. For extreme angles we add extra verts to smooth the joint
Angle = Vector2Ext.Angle(segment.Point.Position - Point.Position, NextPoint.Position - Point.Position);
this.ShouldFuseBottom = shouldFuseBottom;
if (shouldFuseBottom)
{
HasFusedPoint = ShapeCollisions.LineToLine(segment.Bl, segment.Br, Bl, Br, out FusedPoint);
}
else
{
HasFusedPoint = ShapeCollisions.LineToLine(segment.Tl, segment.Tr, Tl, Tr, out FusedPoint);
}
}
void patchJaggedJoint(ref Segment segment, ref int vertIndex)
{
Vector2 intersection;
if (segment.shouldFuseBottom)
{
if (Vector2Ext.getRayIntersection(
segment.tl,
segment.tr,
_lastSegment.tl,
_lastSegment.tr,
out intersection))
{
addVert(vertIndex++, intersection, new Vector2(1, 1), segment.point.color);
_indices.add((short)vertIndex);
_indices.add((short)(vertIndex + 4));
_indices.add((short)(vertIndex - 1));
_indices.add((short)(vertIndex - 1));
_indices.add((short)(vertIndex + 4));
_indices.add((short)(vertIndex - 5));
}
}
else
{
if (Vector2Ext.getRayIntersection(
segment.bl,
segment.br,
_lastSegment.bl,
_lastSegment.br,
out intersection))
{
var firstSegmentOffset = vertIndex == 5 ? 1 : 0;
addVert(vertIndex++, intersection, new Vector2(1, 0), segment.point.color);
_indices.add((short)(vertIndex + 4));
_indices.add((short)(vertIndex + 3));
_indices.add((short)(vertIndex - 1));
_indices.add((short)(vertIndex - 3 + firstSegmentOffset));
_indices.add((short)(vertIndex + 4));
_indices.add((short)(vertIndex - 1));
}
}
}
/// <summary>
/// sets the position of the transform relative to the parent transform. If the transform has no parent, it is the same
/// as Transform.position
/// </summary>
/// <returns>The local position.</returns>
/// <param name="localPosition">Local position.</param>
public Transform setLocalPosition(Vector2 localPosition)
{
if (shouldRoundPosition)
{
Vector2Ext.round(ref localPosition);
}
if (localPosition == _localPosition)
{
return(this);
}
_localPosition = localPosition;
_localDirty = _positionDirty = _localPositionDirty = _localRotationDirty = _localScaleDirty = true;
setDirty(DirtyType.PositionDirty);
return(this);
}
public static void drawCircle(this Batcher batcher, Vector2 position, float radius, Color color, float thickness = 1f, int resolution = 12)
{
var last = Vector2.UnitX * radius;
var lastP = Vector2Ext.perpendicular(last);
for (int i = 1; i <= resolution; i++)
{
var at = Mathf.angleToVector(i * MathHelper.PiOver2 / resolution, radius);
var atP = Vector2Ext.perpendicular(at);
drawLine(batcher, position + last, position + at, color, thickness);
drawLine(batcher, position - last, position - at, color, thickness);
drawLine(batcher, position + lastP, position + atP, color, thickness);
drawLine(batcher, position - lastP, position - atP, color, thickness);
last = at;
lastP = atP;
}
}
public static void DrawCircle(this SpriteBatch spriteBatch, System.Numerics.Vector2 position, float radius, Color color,
float thickness = 1f, int resolution = 12)
{
var last = System.Numerics.Vector2.UnitX * radius;
var lastP = Vector2Ext.Perpendicular(last);
for (int i = 1; i <= resolution; i++)
{
var at = Mathf.AngleToVector(i * MathHelper.PiOver2 / resolution, radius);
var atP = Vector2Ext.Perpendicular(at);
DrawLine(spriteBatch, position + last, position + at, color, thickness);
DrawLine(spriteBatch, position - last, position - at, color, thickness);
DrawLine(spriteBatch, position + lastP, position + atP, color, thickness);
DrawLine(spriteBatch, position - lastP, position - atP, color, thickness);
last = at;
lastP = atP;
}
}
public static void DrawCircle(this Batcher batcher, Vector2 position, float radius, Color color, float thickness = 1f, int resolution = 12)
{
var last = Vector2.UnitX * radius;
var lastP = Vector2Ext.Perpendicular(last);
batcher.SetIgnoreRoundingDestinations(true);
for (int i = 1; i <= resolution; i++)
{
var at = Mathf.AngleToVector(i * MathHelper.PiOver2 / resolution, radius);
var atP = Vector2Ext.Perpendicular(at);
DrawLine(batcher, position + last, position + at, color, thickness);
DrawLine(batcher, position - last, position - at, color, thickness);
DrawLine(batcher, position + lastP, position + atP, color, thickness);
DrawLine(batcher, position - lastP, position - atP, color, thickness);
last = at;
lastP = atP;
}
batcher.SetIgnoreRoundingDestinations(false);
}
void PatchJaggedJoint(ref Segment segment, ref int vertIndex)
{
Vector2 intersection;
if (segment.ShouldFuseBottom)
{
if (Vector2Ext.GetRayIntersection(segment.Tl, segment.Tr, _lastSegment.Tl, _lastSegment.Tr,
out intersection))
{
AddVert(vertIndex++, intersection, new Vector2(1, 1), segment.Point.Color);
_indices.Add((short)vertIndex);
_indices.Add((short)(vertIndex + 4));
_indices.Add((short)(vertIndex - 1));
_indices.Add((short)(vertIndex - 1));
_indices.Add((short)(vertIndex + 4));
_indices.Add((short)(vertIndex - 5));
}
}
else
{
if (Vector2Ext.GetRayIntersection(segment.Bl, segment.Br, _lastSegment.Bl, _lastSegment.Br,
out intersection))
{
var firstSegmentOffset = vertIndex == 5 ? 1 : 0;
AddVert(vertIndex++, intersection, new Vector2(1, 0), segment.Point.Color);
_indices.Add((short)(vertIndex + 4));
_indices.Add((short)(vertIndex + 3));
_indices.Add((short)(vertIndex - 1));
_indices.Add((short)(vertIndex - 3 + firstSegmentOffset));
_indices.Add((short)(vertIndex + 4));
_indices.Add((short)(vertIndex - 1));
}
}
}
public static bool testPointTriangle(Vector2 point, Vector2 a, Vector2 b, Vector2 c)
{
// if point to the right of AB then outside triangle
if (Vector2Ext.cross(point - a, b - a) < 0f)
{
return(false);
}
// if point to the right of BC then outside of triangle
if (Vector2Ext.cross(point - b, c - b) < 0f)
{
return(false);
}
// if point to the right of ca then outside of triangle
if (Vector2Ext.cross(point - c, a - c) < 0f)
{
return(false);
}
// point is in or on triangle
return(true);
}
/// <summary>
/// converts a point from screen coordinates to world
/// </summary>
/// <returns>The to world point.</returns>
/// <param name="screenPosition">Screen position.</param>
public Vector2 screenToWorldPoint(Vector2 screenPosition)
{
updateMatrixes();
Vector2Ext.transform(ref screenPosition, ref _inverseTransformMatrix, out screenPosition);
return(screenPosition);
}
/// <summary>
/// converts a point from world coordinates to screen
/// </summary>
/// <returns>The to screen point.</returns>
/// <param name="worldPosition">World position.</param>
public Vector2 worldToScreenPoint(Vector2 worldPosition)
{
updateMatrixes();
Vector2Ext.transform(ref worldPosition, ref _transformMatrix, out worldPosition);
return(worldPosition);
}
public override void OnAddedToEntity()
{
OriginNormalized = Vector2Ext.HalfVector();
}
public static bool isTriangleCCW(Vector2 a, Vector2 b, Vector2 c)
{
return(Vector2Ext.cross(b - a, c - b) < 0);
}
/// <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;
}
}
void calculateVertices()
{
if (!_areVertsDirty || _points.length < 2)
{
return;
}
_areVertsDirty = false;
_indices.reset();
_vertices.reset();
var maxX = float.MinValue;
var minX = float.MaxValue;
var maxY = float.MinValue;
var minY = float.MaxValue;
if (_useStartEndWidths)
{
_maxWidth = System.Math.Max(_startWidth, _endWidth);
}
// calculate line length first and simulataneously get our min/max points for the bounds
var lineLength = 0f;
var halfMaxWidth = _maxWidth * 0.5f;
_points.buffer[0].lengthFromPreviousPoint = 0;
for (var i = 0; i < _points.length - 1; i++)
{
var distance = Vector2.Distance(_points.buffer[i].position, _points.buffer[i + 1].position);
_points.buffer[i + 1].lengthFromPreviousPoint = distance;
lineLength += distance;
maxX = Mathf.maxOf(maxX, _points.buffer[i].position.X + halfMaxWidth, _points.buffer[i + 1].position.X + halfMaxWidth);
minX = Mathf.minOf(minX, _points.buffer[i].position.X - halfMaxWidth, _points.buffer[i + 1].position.X - halfMaxWidth);
maxY = Mathf.maxOf(maxY, _points.buffer[i].position.Y + halfMaxWidth, _points.buffer[i + 1].position.Y + halfMaxWidth);
minY = Mathf.minOf(minY, _points.buffer[i].position.Y - halfMaxWidth, _points.buffer[i + 1].position.Y - halfMaxWidth);
}
_bounds.x = minX;
_bounds.y = minY;
_bounds.width = maxX - minX;
_bounds.height = maxY - minY;
// special case: single segment
if (_points.length == 2)
{
if (_useStartEndWidths)
{
_points.buffer[0].width = _startWidth;
_points.buffer[1].width = _endWidth;
}
if (_useStartEndColors)
{
_points.buffer[0].color = _startColor;
_points.buffer[1].color = _endColor;
}
_firstSegment.setPoints(ref _points.buffer[0], ref _points.buffer[1]);
addSingleSegmentLine(ref _firstSegment, _points.buffer[1].color);
return;
}
var distanceSoFar = 0f;
var fusedPoint = Vector2.Zero;
var vertIndex = 0;
var thirdPoint = new SegmentPoint();
for (var i = 0; i < _points.length - 1; i++)
{
var firstPoint = _points.buffer[i];
var secondPoint = _points.buffer[i + 1];
var hasThirdPoint = _points.length > i + 2;
if (hasThirdPoint)
{
thirdPoint = _points.buffer[i + 2];
}
// we need the distance along the line of both the first and second points. distanceSoFar will always be for the furthest point
// which is the previous point before adding the current segment distance.
var firstPointDistance = distanceSoFar;
distanceSoFar += secondPoint.lengthFromPreviousPoint;
var firstPointRatio = firstPointDistance / lineLength;
var secondPointRatio = distanceSoFar / lineLength;
var thirdPointRatio = 0f;
if (hasThirdPoint)
{
thirdPointRatio = (distanceSoFar + thirdPoint.lengthFromPreviousPoint) / lineLength;
}
if (_useStartEndColors)
{
ColorExt.lerp(ref _startColor, ref _endColor, out firstPoint.color, firstPointRatio);
ColorExt.lerp(ref _startColor, ref _endColor, out secondPoint.color, secondPointRatio);
if (hasThirdPoint)
{
ColorExt.lerp(ref _startColor, ref _endColor, out thirdPoint.color, thirdPointRatio);
}
}
if (_useStartEndWidths)
{
firstPoint.width = Mathf.lerp(_startWidth, _endWidth, firstPointRatio);
secondPoint.width = Mathf.lerp(_startWidth, _endWidth, secondPointRatio);
if (hasThirdPoint)
{
thirdPoint.width = Mathf.lerp(_startWidth, _endWidth, thirdPointRatio);
}
}
if (i == 0)
{
_firstSegment.setPoints(ref firstPoint, ref secondPoint);
_secondSegment.setPoints(ref secondPoint, ref thirdPoint);
}
else
{
Utils.swap(ref _firstSegment, ref _secondSegment);
if (hasThirdPoint)
{
_secondSegment.setPoints(ref secondPoint, ref thirdPoint);
}
}
// dont recalculate the fusedPoint for the last segment since there will be no third point to work with
if (hasThirdPoint)
{
var shouldFuseBottom = Vector2Ext.isTriangleCCW(firstPoint.position, secondPoint.position, thirdPoint.position);
_secondSegment.setFusedData(shouldFuseBottom, ref _firstSegment);
}
// special care needs to be take with the first segment since it has a different vert count
if (i == 0)
{
addFirstSegment(ref _firstSegment, ref _secondSegment, ref vertIndex);
}
else
{
addSegment(ref _firstSegment, ref vertIndex);
}
_lastSegment.cloneFrom(ref _firstSegment);
}
}
/// <summary>
/// Computes a triangle list that fully covers the area enclosed by the given set of points. If points are not CCW, pass false for
/// the arePointsCCW parameter
/// </summary>
/// <param name="points">A list of points that defines an enclosing path.</param>
/// <param name="count">The number of points in the path.</param>
public void triangulate(Vector2[] points, bool arePointsCCW = true)
{
var count = points.Length;
// set up previous and next links to effectively from a double-linked vert list
initialize(count);
// loop breaker for polys that are not triangulatable
var iterations = 0;
// start at vert 0
var index = 0;
// keep removing verts until just a triangle is left
while (count > 3 && iterations < 500)
{
iterations++;
// test if current vert is an ear
var isEar = true;
var a = points[_triPrev[index]];
var b = points[index];
var c = points[_triNext[index]];
// an ear must be convex (here counterclockwise)
if (Vector2Ext.isTriangleCCW(a, b, c))
{
// loop over all verts not part of the tentative ear
var k = _triNext[_triNext[index]];
do
{
// if vert k is inside the ear triangle, then this is not an ear
if (testPointTriangle(points[k], a, b, c))
{
isEar = false;
break;
}
k = _triNext[k];
} while(k != _triPrev[index]);
}
else
{
// the ear triangle is clockwise so points[i] is not an ear
isEar = false;
}
// if current vert is an ear, delete it and visit the previous vert
if (isEar)
{
// triangle is an ear
triangleIndices.Add(_triPrev[index]);
triangleIndices.Add(index);
triangleIndices.Add(_triNext[index]);
// delete vert by redirecting next and previous links of neighboring verts past it
// decrement vertext count
_triNext[_triPrev[index]] = _triNext[index];
_triPrev[_triNext[index]] = _triPrev[index];
count--;
// visit the previous vert next
index = _triPrev[index];
}
else
{
// current vert is not an ear. visit the next vert
index = _triNext[index];
}
}
// output the final triangle
triangleIndices.Add(_triPrev[index]);
triangleIndices.Add(index);
triangleIndices.Add(_triNext[index]);
if (!arePointsCCW)
{
triangleIndices.Reverse();
}
}
public static Point RoundToPoint(this Vector2 vec)
{
var roundedVec = Vector2Ext.Round(vec);
return(new Point((int)roundedVec.X, (int)roundedVec.Y));
}
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;
}
}
public override void onAddedToEntity()
{
originNormalized = Vector2Ext.halfVector();
}
