public void Calculate (Vector2 p, Vector2 edgeAB, PenWorkspace ws, PenAlignment alignment, bool start)
{
edgeAB.Normalize();
// [ eAB.X -eAB.Y ]
// [ eAB.Y eAB.X ]
float tC = edgeAB.X * _width;
float tS = edgeAB.Y * _width;
float tX = p.X;
float tY = p.Y;
switch (alignment) {
case PenAlignment.Center:
break;
case PenAlignment.Inset:
if (start) {
tX = p.X + (-.5f * tS);
tY = p.Y - (-.5f * tC);
}
else {
tX = p.X - (-.5f * tS);
tY = p.Y + (-.5f * tC);
}
break;
case PenAlignment.Outset:
if (start) {
tX = p.X + (.5f * tS);
tY = p.Y - (.5f * tC);
}
else {
tX = p.X - (.5f * tS);
tY = p.Y + (.5f * tC);
}
break;
}
for (int i = 0; i < _xyBuffer.Length; i++)
ws.XYBuffer[i] = new Vector2(_xyBuffer[i].X * tC - _xyBuffer[i].Y * tS + tX, _xyBuffer[i].X * tS + _xyBuffer[i].Y * tC + tY);
for (int i = 0; i < _uvBuffer.Length; i++)
ws.UVBuffer[i] = _uvBuffer[i];
for (int i = 0; i < _indexBuffer.Length; i++)
ws.IndexBuffer[i] = _indexBuffer[i];
for (int i = 0; i < _outlineBuffer.Length; i++)
ws.OutlineIndexBuffer[i] = _outlineBuffer[i];
ws.XYBuffer.Index = _xyBuffer.Length;
ws.UVBuffer.Index = _uvBuffer.Length;
ws.IndexBuffer.Index = _indexBuffer.Length;
ws.OutlineIndexBuffer.Index = _outlineBuffer.Length;
}
internal void ComputeEndPoint (Vector2 a, Vector2 b, PenWorkspace ws)
{
EndCapInfo.Calculate(b, a - b, ws, Alignment, false);
for (int i = 0; i < ws.UVBuffer.Index; i++)
ws.UVBuffer[i] = new Vector2(1 - ws.UVBuffer[i].X, ws.PathLength);
}
internal void ComputeStartPoint (Vector2 a, Vector2 b, PenWorkspace ws)
{
StartCapInfo.Calculate(a, b - a, ws, Alignment, true);
}
//internal InsetOutsetCount ComputeBevel (Vector2 a, Vector2 b, Vector2 c, PenWorkspace ws)
internal InsetOutsetCount ComputeBevel (ref JoinSample js, PenWorkspace ws)
{
Vector2 a = js.PointA;
Vector2 b = js.PointB;
Vector2 c = js.PointC;
Vector2 edgeBA = new Vector2(a.X - b.X, a.Y - b.Y);
Vector2 edgeBC = new Vector2(c.X - b.X, c.Y - b.Y);
double dot = Vector2.Dot(edgeBA, edgeBC);
if (dot < 0) {
double den = edgeBA.LengthSquared() * edgeBC.LengthSquared();
double cos2 = (dot * dot) / den;
if (cos2 > _joinLimitCos2)
return ComputeMiter(ref js, ws);
}
Vector2 edgeAB = new Vector2(b.X - a.X, b.Y - a.Y);
edgeAB.Normalize();
Vector2 edgeABt = new Vector2(-edgeAB.Y, edgeAB.X);
edgeBC.Normalize();
Vector2 edgeBCt = new Vector2(-edgeBC.Y, edgeBC.X);
Vector2 pointA = a;
Vector2 pointC = c;
short vertexCount = 0;
if (Cross2D(edgeAB, edgeBC) > 0) {
switch (Alignment) {
case PenAlignment.Center:
float w2 = Width / 2;
pointA = new Vector2(a.X - w2 * edgeABt.X, a.Y - w2 * edgeABt.Y);
pointC = new Vector2(c.X - w2 * edgeBCt.X, c.Y - w2 * edgeBCt.Y);
ws.XYInsetBuffer[0] = new Vector2(b.X + w2 * edgeABt.X, b.Y + w2 * edgeABt.Y);
ws.XYInsetBuffer[1] = new Vector2(b.X + w2 * edgeBCt.X, b.Y + w2 * edgeBCt.Y);
vertexCount = 2;
break;
case PenAlignment.Inset:
ws.XYInsetBuffer[0] = new Vector2(b.X + Width * edgeABt.X, b.Y + Width * edgeABt.Y);
ws.XYInsetBuffer[1] = new Vector2(b.X + Width * edgeBCt.X, b.Y + Width * edgeBCt.Y);
vertexCount = 2;
break;
case PenAlignment.Outset:
pointA = new Vector2(a.X - Width * edgeABt.X, a.Y - Width * edgeABt.Y);
pointC = new Vector2(c.X - Width * edgeBCt.X, c.Y - Width * edgeBCt.Y);
ws.XYInsetBuffer[0] = b;
vertexCount = 1;
break;
}
Vector2 point5;
float tdiv = Vector2.Dot(edgeBCt, edgeAB);
if (Math.Abs(tdiv) < 0.0005f) {
point5 = new Vector2((pointA.X + pointC.X) / 2, (pointA.Y + pointC.Y) / 2);
}
else {
float offset35 = Vector2.Dot(edgeBCt, pointC);
float t5 = (offset35 - Vector2.Dot(edgeBCt, pointA)) / tdiv;
point5 = new Vector2(pointA.X + t5 * edgeAB.X, pointA.Y + t5 * edgeAB.Y);
}
ws.XYOutsetBuffer[0] = point5;
ws.UVOutsetBuffer[0] = new Vector2(1, js.LengthB);
for (int i = 0; i < vertexCount; i++)
ws.UVInsetBuffer[i] = new Vector2(0, js.LengthB);
return new InsetOutsetCount(vertexCount, 1, false);
}
else {
switch (Alignment) {
case PenAlignment.Center:
float w2 = Width / 2;
pointA = new Vector2(a.X + w2 * edgeABt.X, a.Y + w2 * edgeABt.Y);
pointC = new Vector2(c.X + w2 * edgeBCt.X, c.Y + w2 * edgeBCt.Y);
ws.XYOutsetBuffer[0] = new Vector2(b.X - w2 * edgeABt.X, b.Y - w2 * edgeABt.Y);
ws.XYOutsetBuffer[1] = new Vector2(b.X - w2 * edgeBCt.X, b.Y - w2 * edgeBCt.Y);
vertexCount = 2;
break;
case PenAlignment.Inset:
pointA = new Vector2(a.X + Width * edgeABt.X, a.Y + Width * edgeABt.Y);
pointC = new Vector2(c.X + Width * edgeBCt.X, c.Y + Width * edgeBCt.Y);
ws.XYOutsetBuffer[0] = b;
vertexCount = 1;
break;
case PenAlignment.Outset:
ws.XYOutsetBuffer[0] = new Vector2(b.X - Width * edgeABt.X, b.Y - Width * edgeABt.Y);
ws.XYOutsetBuffer[1] = new Vector2(b.X - Width * edgeBCt.X, b.Y - Width * edgeBCt.Y);
vertexCount = 2;
break;
}
Vector2 point0;
float tdiv = Vector2.Dot(edgeBCt, edgeAB);
if (Math.Abs(tdiv) < 0.0005f) {
point0 = new Vector2((pointA.X + pointC.X) / 2, (pointA.Y + pointC.Y) / 2);
}
else {
float offset01 = Vector2.Dot(edgeBCt, pointC);
float t0 = (offset01 - Vector2.Dot(edgeBCt, pointA)) / tdiv;
point0 = new Vector2(pointA.X + t0 * edgeAB.X, pointA.Y + t0 * edgeAB.Y);
}
ws.XYInsetBuffer[0] = point0;
ws.UVInsetBuffer[0] = new Vector2(0, js.LengthB);
for (int i = 0; i < vertexCount; i++)
ws.UVOutsetBuffer[i] = new Vector2(1, js.LengthB);
return new InsetOutsetCount(1, vertexCount, true);
}
}
//internal InsetOutsetCount ComputeMiter (Vector2 a, Vector2 b, Vector2 c, PenWorkspace ws)
internal InsetOutsetCount ComputeMiter (ref JoinSample js, PenWorkspace ws)
{
Vector2 a = js.PointA;
Vector2 b = js.PointB;
Vector2 c = js.PointC;
Vector2 edgeAB = new Vector2(b.X - a.X, b.Y - a.Y);
edgeAB.Normalize();
Vector2 edgeABt = new Vector2(-edgeAB.Y, edgeAB.X);
Vector2 edgeBC = new Vector2(c.X - b.X, c.Y - b.Y);
edgeBC.Normalize();
Vector2 edgeBCt = new Vector2(-edgeBC.Y, edgeBC.X);
Vector2 point1, point2, point3, point4;
switch (Alignment) {
case PenAlignment.Center:
float w2 = Width / 2;
point2 = new Vector2(a.X + w2 * edgeABt.X, a.Y + w2 * edgeABt.Y);
point4 = new Vector2(a.X - w2 * edgeABt.X, a.Y - w2 * edgeABt.Y);
point1 = new Vector2(c.X + w2 * edgeBCt.X, c.Y + w2 * edgeBCt.Y);
point3 = new Vector2(c.X - w2 * edgeBCt.X, c.Y - w2 * edgeBCt.Y);
break;
case PenAlignment.Inset:
point2 = new Vector2(a.X + Width * edgeABt.X, a.Y + Width * edgeABt.Y);
point4 = a;
point1 = new Vector2(c.X + Width * edgeBCt.X, c.Y + Width * edgeBCt.Y);
point3 = c;
break;
case PenAlignment.Outset:
point2 = a;
point4 = new Vector2(a.X - Width * edgeABt.X, a.Y - Width * edgeABt.Y);
point1 = c;
point3 = new Vector2(c.X - Width * edgeBCt.X, c.Y - Width * edgeBCt.Y);
break;
default:
point2 = Vector2.Zero;
point4 = Vector2.Zero;
point1 = Vector2.Zero;
point3 = Vector2.Zero;
break;
}
Vector2 point0, point5;
float tdiv = Vector2.Dot(edgeBCt, edgeAB);
if (Math.Abs(tdiv) < .0005f) {
point0 = new Vector2((point2.X + point1.X) / 2, (point2.Y + point1.Y) / 2);
point5 = new Vector2((point4.X + point3.X) / 2, (point4.Y + point3.Y) / 2);
}
else {
float offset01 = Vector2.Dot(edgeBCt, point1);
float t0 = (offset01 - Vector2.Dot(edgeBCt, point2)) / tdiv;
float offset35 = Vector2.Dot(edgeBCt, point3);
float t5 = (offset35 - Vector2.Dot(edgeBCt, point4)) / tdiv;
point0 = new Vector2(point2.X + t0 * edgeAB.X, point2.Y + t0 * edgeAB.Y);
point5 = new Vector2(point4.X + t5 * edgeAB.X, point4.Y + t5 * edgeAB.Y);
}
double miterLimit = MiterLimit * Width;
if ((point0 - point5).LengthSquared() > miterLimit * miterLimit)
return ComputeBevel(ref js, ws);
ws.XYInsetBuffer[0] = point0;
ws.XYOutsetBuffer[0] = point5;
ws.UVInsetBuffer[0] = new Vector2(0, js.LengthB);
ws.UVOutsetBuffer[0] = new Vector2(1, js.LengthB);
return new InsetOutsetCount(1, 1);
}
private void AddPath (CCVector2[] points, int offset, int count, Pen pen, PenWorkspace ws)
{
RequestBufferSpace(count * 2, (count - 1) * 6);
_ws.ResetWorkspace(pen);
AddInfo(PrimitiveType.TriangleList, count * 2, (count - 1) * 6, pen.Brush);
int baseVertexIndex = _vertexBufferIndex;
AddStartPoint(points[offset + 0], points[offset + 1], pen, _ws);
JoinSample js = new JoinSample(CCVector2.Zero, points[offset + 0], points[offset + 1]);
for (int i = 0; i < count - 2; i++) {
js.Advance(points[offset + i + 2]);
AddMiteredJoint(ref js, pen, ws);
}
AddEndPoint(points[offset + count - 2], points[offset + count - 1], pen, _ws);
for (int i = 0; i < count - 1; i++)
AddSegment(baseVertexIndex + i * 2, baseVertexIndex + (i + 1) * 2);
}
/// <summary>
/// Enables a group of figures to be drawn using the same settings.
/// </summary>
/// <param name="device"></param>
//public DrawBatch (GraphicsDevice device)
//{
public DrawBatch () : base()
{
//if (device == null)
// throw new ArgumentNullException("device");
//_device = device;
//_device.DeviceReset += GraphicsDeviceReset;
_infoBuffer = new DrawingInfo[2048];
_indexBuffer = new short[32768];
//_vertexBuffer = new VertexPositionColorTexture[8192];
_computeBuffer = new CCVector2[64];
_colorBuffer = new Color[64];
_geometryBuffer = new CCVector2[256];
_pathBuilder = new PathBuilder();
//_standardEffect = new BasicEffect(device);
//_standardEffect.TextureEnabled = true;
//_standardEffect.VertexColorEnabled = true;
//_defaultTexture = new Texture2D(device, 1, 1);
//_defaultTexture.SetData<Color>(new Color[] { Microsoft.Xna.Framework.Color.White });
_ws = new PenWorkspace();
}
/// <summary>
/// Immediatley renders a <see cref="DrawCache"/> object.
/// </summary>
/// <param name="cache">A <see cref="DrawCache"/> object.</param>
/// <remarks>Any previous unflushed geometry will be rendered first.</remarks>
//public void DrawCache (DrawCache cache)
//{
// if (_sortMode != DrawSortMode.Immediate)
// SetRenderState();
// FlushBuffer();
// cache.Render(_device, _defaultTexture);
//}
//private void SetRenderState ()
//{
// _device.BlendState = (_blendState != null)
// ? _blendState : BlendState.AlphaBlend;
// _device.DepthStencilState = (_depthStencilState != null)
// ? _depthStencilState : DepthStencilState.None;
// _device.RasterizerState = (_rasterizerState != null)
// ? _rasterizerState : RasterizerState.CullCounterClockwise;
// _device.SamplerStates[0] = (_samplerState != null)
// ? _samplerState : SamplerState.PointWrap;
// _standardEffect.Projection = Matrix.CreateOrthographicOffCenter(0, _device.Viewport.Width, _device.Viewport.Height, 0, -1, 1);
// _standardEffect.World = _transform;
// _standardEffect.CurrentTechnique.Passes[0].Apply();
// if (_effect != null)
// _effect.CurrentTechnique.Passes[0].Apply();
//}
private void AddMiteredJoint (ref JoinSample js, Pen pen, PenWorkspace ws)
{
InsetOutsetCount vioCount = pen.ComputeMiter(ref js, ws);
AddVertex(ws.XYInsetBuffer[0], pen.ColorAt(ws.UVInsetBuffer[0], ws.PathLengthScale), pen);
AddVertex(ws.XYOutsetBuffer[0], pen.ColorAt(ws.UVOutsetBuffer[0], ws.PathLengthScale), pen);
}
private void AddEndPoint (CCVector2 a, CCVector2 b, Pen pen, PenWorkspace ws)
{
pen.ComputeEndPoint(a, b, ws);
AddVertex(ws.XYBuffer[0], pen.ColorAt(ws.UVBuffer[0], ws.PathLengthScale), pen);
AddVertex(ws.XYBuffer[1], pen.ColorAt(ws.UVBuffer[1], ws.PathLengthScale), pen);
}
private int AddJoint (int pointIndex, InsetOutsetCount vioCount, PenWorkspace ws)
{
int vIndex = _vertexBufferIndex;
_vertexBufferIndex += vioCount.InsetCount + vioCount.OutsetCount;
if (!vioCount.CCW) {
_jointCCW[pointIndex] = false;
_positionData[vIndex + 0] = ws.XYOutsetBuffer[0];
for (int i = 0; i < vioCount.InsetCount; i++)
_positionData[vIndex + 1 + i] = ws.XYInsetBuffer[i];
for (int i = 0; i < vioCount.InsetCount - 1; i++) {
_indexData[_indexBufferIndex++] = (short)(vIndex);
_indexData[_indexBufferIndex++] = (short)(vIndex + i + 2);
_indexData[_indexBufferIndex++] = (short)(vIndex + i + 1);
}
}
else {
_jointCCW[pointIndex] = true;
_positionData[vIndex + 0] = ws.XYInsetBuffer[0];
for (int i = 0; i < vioCount.OutsetCount; i++)
_positionData[vIndex + 1 + i] = ws.XYOutsetBuffer[i];
for (int i = 0; i < vioCount.OutsetCount - 1; i++) {
_indexData[_indexBufferIndex++] = (short)(vIndex);
_indexData[_indexBufferIndex++] = (short)(vIndex + i + 1);
_indexData[_indexBufferIndex++] = (short)(vIndex + i + 2);
}
}
if (_colorData != null) {
if (!vioCount.CCW) {
_colorData[vIndex] = _pen.ColorAt(ws.UVOutsetBuffer[0], ws.PathLengthScale);
for (int i = 0; i < vioCount.InsetCount; i++)
_colorData[vIndex + 1 + i] = _pen.ColorAt(ws.UVInsetBuffer[i], ws.PathLengthScale);
}
else {
_colorData[vIndex] = _pen.ColorAt(ws.UVInsetBuffer[0], ws.PathLengthScale);
for (int i = 0; i < vioCount.OutsetCount; i++)
_colorData[vIndex + 1 + i] = _pen.ColorAt(ws.UVOutsetBuffer[i], ws.PathLengthScale);
}
}
if (_textureData != null) {
int texWidth = _pen.Brush.Texture.Width;
int texHeight = _pen.Brush.Texture.Height;
for (int i = vIndex; i < _vertexBufferIndex; i++) {
Vector2 pos = _positionData[i];
_textureData[i] = new Vector2(pos.X / texWidth, pos.Y / texHeight);
}
}
return _vertexBufferIndex - vIndex;
}
private int AddJoint (int pointIndex, ref JoinSample joinSample, PenWorkspace ws, Buffer<Vector2> insetBuffer, Buffer<Vector2> outsetBuffer)
{
InsetOutsetCount vioCount = new InsetOutsetCount();
switch (_pen.LineJoin) {
case LineJoin.Miter:
vioCount = _pen.ComputeMiter(ref joinSample, ws);
break;
case LineJoin.Bevel:
vioCount = _pen.ComputeBevel(ref joinSample, ws);
break;
}
if (insetBuffer != null) {
for (int i = 0; i < vioCount.InsetCount; i++)
insetBuffer.SetNext(ws.XYInsetBuffer[i]);
}
if (outsetBuffer != null) {
for (int i = 0; i < vioCount.OutsetCount; i++)
outsetBuffer.SetNext(ws.XYOutsetBuffer[i]);
}
return (_strokeType != StrokeType.Outline) ? AddJoint(pointIndex, vioCount, ws) : 0;
}
private int AddStartOrEndPoint (int pointIndex, PenWorkspace ws, Buffer<Vector2> positionBuffer, bool ccw)
{
int xyCount = ws.XYBuffer.Index;
if (positionBuffer != null) {
for (int i = 0; i < ws.OutlineIndexBuffer.Index; i++)
positionBuffer.SetNext(ws.XYBuffer[ws.OutlineIndexBuffer[i]]);
}
if (_strokeType == StrokeType.Outline)
return 0;
int baseIndex = _vertexBufferIndex;
_vertexBufferIndex += xyCount;
for (int i = 0; i < xyCount; i++)
_positionData[baseIndex + i] = ws.XYBuffer[i];
for (int i = 0; i < ws.IndexBuffer.Index; i++)
_indexData[_indexBufferIndex++] = (short)(baseIndex + ws.IndexBuffer[i]);
if (_colorData != null) {
for (int i = 0; i < xyCount; i++)
_colorData[baseIndex + i] = _pen.ColorAt(ws.UVBuffer[i], ws.PathLengthScale);
}
if (_textureData != null) {
int texWidth = _pen.Brush.Texture.Width;
int texHeight = _pen.Brush.Texture.Height;
for (int i = baseIndex; i < _vertexBufferIndex; i++) {
Vector2 pos = _positionData[i];
_textureData[i] = new Vector2(pos.X / texWidth, pos.Y / texHeight);
}
}
_jointCCW[pointIndex] = ccw;
return xyCount;
}
private int AddEndPoint (int pointIndex, Vector2 a, Vector2 b, PenWorkspace ws, Buffer<Vector2> positionBuffer)
{
_pen.ComputeEndPoint(a, b, ws);
int xyCount = AddStartOrEndPoint(pointIndex, ws, positionBuffer, true);
return xyCount;
}
private int AddStartPoint (int pointIndex, Vector2 a, Vector2 b, PenWorkspace ws, Buffer<Vector2> positionBuffer)
{
_pen.ComputeStartPoint(a, b, ws);
int xyCount = AddStartOrEndPoint(pointIndex, ws, positionBuffer, false);
if (positionBuffer != null)
Array.Reverse(positionBuffer.Data, positionBuffer.Index - ws.OutlineIndexBuffer.Index, ws.OutlineIndexBuffer.Index);
return xyCount;
}
