/*
* TL TR
* 0----1 0,1,2,3 = index offsets for vertex indices
* | /|
* | / |
* | / |
* |/ |
* 2----3
* BL BR
*/
void GenerateGradient(CCSize textureSizeInPixels)
{
var gradientNode = new CCDrawNode();
var gradientAlpha = new CCColor4B(0, 0, 0,(byte)(0.7f * 255f));
CCV3F_C4B[] vertices = new CCV3F_C4B[6];
// Left triangle TL - 0
vertices[0].Vertices = new CCVertex3F(0, textureSizeInPixels.Height, 0);
vertices[0].Colors = CCColor4B.Transparent;
// Left triangle BL - 2
vertices[1].Vertices = new CCVertex3F(0, 0, 0);
vertices[1].Colors = gradientAlpha;
// Left triangle TR - 1
vertices[2].Vertices = new CCVertex3F(textureSizeInPixels.Width, textureSizeInPixels.Height, 0);
vertices[2].Colors = CCColor4B.Transparent;
// Right triangle BL - 2
vertices[3].Vertices = new CCVertex3F(0, 0, 0);
vertices[3].Colors = gradientAlpha;
// Right triangle BR - 3
vertices[4].Vertices = new CCVertex3F(textureSizeInPixels.Width, 0, 0);
vertices[4].Colors = gradientAlpha;
// Right triangle TR - 1
vertices[5].Vertices = new CCVertex3F(textureSizeInPixels.Width, textureSizeInPixels.Height, 0);
vertices[5].Colors = CCColor4B.Transparent;
gradientNode.DrawTriangleList(vertices);
gradientNode.Visit();
}
public static CCV3F_C4B ToVectorC4B(this b2Vec2 vec, CCColor4B color, int PTMRatio)
{
var v3f_c4b = new CCV3F_C4B();
v3f_c4b.Vertices.X = vec.x * PTMRatio;
v3f_c4b.Vertices.Y = vec.y * PTMRatio;
v3f_c4b.Colors = color;
return v3f_c4b;
}
/*
* TL TR
* 0----1 0,1,2,3 = index offsets for vertex indices
* | /|
* | / |
* | / |
* |/ |
* 2----3
* BL BR
*/
void GenerateStripes (CCSize textureSizeInPixels, CCColor4B c2, int numberOfStripes)
{
var gradientNode = new CCDrawNode();
// Layer 1: Stripes
CCV3F_C4B[] vertices = new CCV3F_C4B[numberOfStripes*6];
var textureWidth = textureSizeInPixels.Width;
var textureHeight = textureSizeInPixels.Height;
int nVertices = 0;
float x1 = -textureHeight;
float x2;
float y1 = textureHeight;
float y2 = 0;
float dx = textureWidth / numberOfStripes * 2;
float stripeWidth = dx/2;
for (int i=0; i<numberOfStripes; i++)
{
x2 = x1 + textureHeight;
// Left triangle TL - 0
vertices[nVertices].Vertices = new CCVertex3F(x1, y1, 0);
vertices[nVertices++].Colors = c2;
// Left triangle BL - 2
vertices[nVertices].Vertices = new CCVertex3F(x1+stripeWidth, y1, 0);
vertices[nVertices++].Colors = c2;
// Left triangle TR - 1
vertices[nVertices].Vertices = new CCVertex3F(x2, y2, 0);
vertices[nVertices++].Colors = c2;
// Right triangle BL - 2
vertices[nVertices].Vertices = vertices[nVertices-2].Vertices;
vertices[nVertices++].Colors = c2;
// Right triangle BR - 3
vertices[nVertices].Vertices = vertices[nVertices-2].Vertices;
vertices[nVertices++].Colors = c2;
// Right triangle TR - 1
vertices[nVertices].Vertices = new CCVertex3F(x2+stripeWidth, y2, 0);
vertices[nVertices++].Colors = c2;
x1 += dx;
}
gradientNode.DrawTriangleList(vertices);
gradientNode.Visit();
}
public void Transform(ref CCV3F_C4B quadPoint)
{
var x = quadPoint.Vertices.X;
var y = quadPoint.Vertices.Y;
var z = quadPoint.Vertices.Z;
Transform(ref x, ref y, ref z);
quadPoint.Vertices.X = x;
quadPoint.Vertices.Y = y;
quadPoint.Vertices.Z = z;
}
// Used for drawing line caps
public void DrawSolidArc(CCPoint pos, float radius, float startAngle, float sweepAngle, CCColor4B color)
{
var cl = color;
int segments = (int)(10 * (float)Math.Sqrt(radius)); //<- Let's try to guess at # segments for a reasonable smoothness
float theta = sweepAngle / (segments - 1); // MathHelper.Pi * 2.0f / segments;
float tangetial_factor = (float)Math.Tan(theta); //calculate the tangential factor
float radial_factor = (float)Math.Cos(theta); //calculate the radial factor
float x = radius * (float)Math.Cos(startAngle); //we now start at the start angle
float y = radius * (float)Math.Sin(startAngle);
var verticeCenter = new CCV3F_C4B(pos, cl);
var vert1 = new CCV3F_C4B(CCVertex3F.Zero, cl);
float tx = 0;
float ty = 0;
for (int i = 0; i < segments - 1; i++)
{
AddTriangleVertex(verticeCenter);
vert1.Vertices.X = x + pos.X;
vert1.Vertices.Y = y + pos.Y;
AddTriangleVertex(vert1); // output vertex
//calculate the tangential vector
//remember, the radial vector is (x, y)
//to get the tangential vector we flip those coordinates and negate one of them
tx = -y;
ty = x;
//add the tangential vector
x += tx * tangetial_factor;
y += ty * tangetial_factor;
//correct using the radial factor
x *= radial_factor;
y *= radial_factor;
vert1.Vertices.X = x + pos.X;
vert1.Vertices.Y = y + pos.Y;
AddTriangleVertex(vert1); // output vertex
}
dirty = true;
}
public void DrawCircle(CCPoint center, float radius, int segments, CCColor4B color)
{
var cl = color;
float theta = MathHelper.Pi * 2.0f / segments;
float tangetial_factor = (float)Math.Tan(theta); //calculate the tangential factor
float radial_factor = (float)Math.Cos(theta); //calculate the radial factor
float x = radius; //we start at angle = 0
float y = 0;
var vert1 = new CCV3F_C4B(CCVertex3F.Zero, cl);
float tx = 0;
float ty = 0;
for (int i = 0; i < segments; i++)
{
vert1.Vertices.X = x + center.X;
vert1.Vertices.Y = y + center.Y;
AddLineVertex(vert1); // output vertex
//calculate the tangential vector
//remember, the radial vector is (x, y)
//to get the tangential vector we flip those coordinates and negate one of them
tx = -y;
ty = x;
//add the tangential vector
x += tx * tangetial_factor;
y += ty * tangetial_factor;
//correct using the radial factor
x *= radial_factor;
y *= radial_factor;
vert1.Vertices.X = x + center.X;
vert1.Vertices.Y = y + center.Y;
AddLineVertex(vert1); // output vertex
}
dirty = true;
}
public void DrawCircle(CCPoint center, float radius, int segments, CCColor4B color)
{
var cl = color;
float theta = MathHelper.Pi * 2.0f / segments;
float tangetial_factor = (float)Math.Tan(theta); //calculate the tangential factor
float radial_factor = (float)Math.Cos(theta); //calculate the radial factor
float x = radius; //we start at angle = 0
float y = 0;
var vert1 = new CCV3F_C4B(CCVertex3F.Zero, cl);
float tx = 0;
float ty = 0;
for (int i = 0; i < segments; i++)
{
vert1.Vertices.X = x + center.X;
vert1.Vertices.Y = y + center.Y;
AddLineVertex(vert1); // output vertex
//calculate the tangential vector
//remember, the radial vector is (x, y)
//to get the tangential vector we flip those coordinates and negate one of them
tx = -y;
ty = x;
//add the tangential vector
x += tx * tangetial_factor;
y += ty * tangetial_factor;
//correct using the radial factor
x *= radial_factor;
y *= radial_factor;
vert1.Vertices.X = x + center.X;
vert1.Vertices.Y = y + center.Y;
AddLineVertex(vert1); // output vertex
}
dirty = true;
}
void FlushTriangles()
{
if (!hasBegun)
{
throw new InvalidOperationException("Begin must be called before Flush can be called.");
}
if (triangleVertsCount >= 3)
{
int primitiveCount = triangleVertsCount / 3;
var triangles = new CCV3F_C4B[triangleVertsCount];
Array.Copy(triangleVertices, triangles, triangleVertsCount);
// add the Triangle List to our triangles list vertices for later rendering from the Renderer
triangleVerts.Add(triangles);
triangleVertsCount -= primitiveCount * 3;
}
}
void FlushLines()
{
if (!hasBegun)
{
throw new InvalidOperationException("Begin must be called before Flush can be called.");
}
if (lineVertsCount >= 2)
{
int primitiveCount = lineVertsCount / 2;
var lines = new CCV3F_C4B[lineVertsCount];
Array.Copy(lineVertices, lines, triangleVertsCount);
// add the Line Lists to our line list vertices for later rendering from the Renderer
lineVerts.Add(lines);
lineVertsCount -= primitiveCount * 2;
}
}
public void DrawLineList (CCV3F_C4B[] verts)
{
for (int x = 0; x < verts.Length; x++)
{
AddLineVertex(verts[x]);
}
}
public void DrawTriangleList (CCV3F_C4B[] verts)
{
for (int x = 0; x < verts.Length; x++)
{
AddTriangleVertex(verts[x]);
}
}
// Used for drawing line caps
public void DrawSolidArc(CCPoint pos, float radius, float startAngle, float sweepAngle, CCColor4B color)
{
var cl = color;
int segments = (int)(10 * (float)Math.Sqrt(radius)); //<- Let's try to guess at # segments for a reasonable smoothness
float theta = sweepAngle / (segments - 1);// MathHelper.Pi * 2.0f / segments;
float tangetial_factor = (float)Math.Tan(theta); //calculate the tangential factor
float radial_factor = (float)Math.Cos(theta); //calculate the radial factor
float x = radius * (float)Math.Cos(startAngle); //we now start at the start angle
float y = radius * (float)Math.Sin(startAngle);
var verticeCenter = new CCV3F_C4B(pos, cl);
var vert1 = new CCV3F_C4B(CCVertex3F.Zero, cl);
float tx = 0;
float ty = 0;
for (int i = 0; i < segments - 1; i++)
{
AddTriangleVertex(verticeCenter);
vert1.Vertices.X = x + pos.X;
vert1.Vertices.Y = y + pos.Y;
AddTriangleVertex(vert1); // output vertex
//calculate the tangential vector
//remember, the radial vector is (x, y)
//to get the tangential vector we flip those coordinates and negate one of them
tx = -y;
ty = x;
//add the tangential vector
x += tx * tangetial_factor;
y += ty * tangetial_factor;
//correct using the radial factor
x *= radial_factor;
y *= radial_factor;
vert1.Vertices.X = x + pos.X;
vert1.Vertices.Y = y + pos.Y;
AddTriangleVertex(vert1); // output vertex
}
dirty = true;
}
public void AddLineVertex (CCV3F_C4B lineVertex)
{
lineVertices.Add(lineVertex);
}
public void Transform(ref CCV3F_C4B quadPoint)
{
var x = quadPoint.Vertices.X;
var y = quadPoint.Vertices.Y;
var z = quadPoint.Vertices.Z;
Transform(ref x, ref y, ref z);
quadPoint.Vertices.X = x;
quadPoint.Vertices.Y = y;
quadPoint.Vertices.Z = z;
}
public void AddLineVertex(CCV3F_C4B lineVertex)
{
lineVertices.Add(lineVertex);
}
public void DrawLineList (CCV3F_C4B[] verts)
{
for (int x = 0; x < verts.Length; x++)
{
batch.AddVertex(verts[x].Vertices, verts[x].Colors, PrimitiveType.LineList);
}
}
public void AddTriangleVertex(CCV3F_C4B triangleVertex)
{
TriangleVertices.Add(triangleVertex);
dirty = true;
}
void FlushLines()
{
if (!hasBegun)
{
throw new InvalidOperationException("Begin must be called before Flush can be called.");
}
if (lineVertsCount >= 2)
{
int primitiveCount = lineVertsCount / 2;
var lines = new CCV3F_C4B[lineVertsCount];
Array.Copy(lineVertices, lines, triangleVertsCount);
// add the Line Lists to our line list vertices for later rendering from the Renderer
lineVerts.Add(lines);
lineVertsCount -= primitiveCount * 2;
}
}
void FlushTriangles()
{
if (!hasBegun)
{
throw new InvalidOperationException("Begin must be called before Flush can be called.");
}
if (triangleVertsCount >= 3)
{
int primitiveCount = triangleVertsCount / 3;
var triangles = new CCV3F_C4B[triangleVertsCount];
Array.Copy(triangleVertices, triangles, triangleVertsCount);
// add the Triangle List to our triangles list vertices for later rendering from the Renderer
triangleVerts.Add(triangles);
triangleVertsCount -= primitiveCount * 3;
}
}
public void AddLineVertex(CCV3F_C4B lineVertex)
{
lineVertices.Add(lineVertex);
dirty = true;
}
void LineList ()
{
CCV3F_C4B[] verts = new CCV3F_C4B[] {
// First line:
new CCV3F_C4B (new CCPoint (0, 0), CCColor4B.White),
new CCV3F_C4B (new CCPoint (30, 60), CCColor4B.White),
// second line, will blend from white to red:
new CCV3F_C4B (new CCPoint (60, 0), CCColor4B.White),
new CCV3F_C4B (new CCPoint (120, 120), CCColor4B.Red)
};
drawNode.DrawLineList (verts);
}
void TriangleList ()
{
CCV3F_C4B[] verts = new CCV3F_C4B[] {
// First triangle:
new CCV3F_C4B (new CCPoint (0, 0), CCColor4B.White),
new CCV3F_C4B (new CCPoint (30, 60), CCColor4B.White),
new CCV3F_C4B (new CCPoint (60, 0), CCColor4B.White),
// second triangle, each point has different colors:
new CCV3F_C4B (new CCPoint (90, 0), CCColor4B.Yellow),
new CCV3F_C4B (new CCPoint (120, 60), CCColor4B.Red),
new CCV3F_C4B (new CCPoint (150, 0), CCColor4B.Blue)
};
drawNode.DrawTriangleList (verts);
}
public override void OnEnter()
{
base.OnEnter();
CCSize windowSize = Layer.VisibleBoundsWorldspace.Size;
CCDrawNode draw = new CCDrawNode();
AddChild(draw, 10);
var s = windowSize;
// Draw 10 circles
for (int i = 0; i < 10; i++)
{
draw.DrawSolidCircle(s.Center, 10 * (10 - i),
new CCColor4F(CCRandom.Float_0_1(), CCRandom.Float_0_1(), CCRandom.Float_0_1(), 1));
}
// Draw polygons
CCV3F_C4B[] points = new CCV3F_C4B[3];
points[0].Colors = CCColor4B.Red;
points[0].Colors.A = 127;
points[1].Colors = CCColor4B.Green;
points[1].Colors.A = 127;
points[2].Colors = CCColor4B.Blue;
points[2].Colors.A = 127;
points[0].Vertices.X = windowSize.Height / 4;
points[0].Vertices.Y = 0;
points[1].Vertices.X = windowSize.Width;
points[1].Vertices.Y = windowSize.Height / 5;
points[2].Vertices.X = windowSize.Width / 3 * 2;
points[2].Vertices.Y = windowSize.Height;
draw.DrawTriangleList(points);
// star poly (triggers buggs)
{
const float o = 80;
const float w = 20;
const float h = 50;
CCPoint[] star = new CCPoint[]
{
new CCPoint(o + w, o - h), new CCPoint(o + w * 2, o), // lower spike
new CCPoint(o + w * 2 + h, o + w), new CCPoint(o + w * 2, o + w * 2), // right spike
};
draw.DrawPolygon(star, star.Length, new CCColor4F(1, 0, 0, 0.5f), 1, new CCColor4F(0, 0, 1, 1));
}
// star poly (doesn't trigger bug... order is important un tesselation is supported.
{
const float o = 180;
const float w = 20;
const float h = 50;
var star = new CCPoint[]
{
new CCPoint(o, o), new CCPoint(o + w, o - h), new CCPoint(o + w * 2, o), // lower spike
new CCPoint(o + w * 2 + h, o + w), new CCPoint(o + w * 2, o + w * 2), // right spike
new CCPoint(o + w, o + w * 2 + h), new CCPoint(o, o + w * 2), // top spike
new CCPoint(o - h, o + w), // left spike
};
draw.DrawPolygon(star, star.Length, new CCColor4F(1, 0, 0, 0.5f), 1, new CCColor4F(0, 0, 1, 1));
}
// Draw segment
draw.DrawLine(new CCPoint(20, windowSize.Height), new CCPoint(20, windowSize.Height / 2), 10, new CCColor4F(0, 1, 0, 1), CCLineCap.Round);
draw.DrawLine(new CCPoint(10, windowSize.Height / 2), new CCPoint(windowSize.Width / 2, windowSize.Height / 2), 40,
new CCColor4F(1, 0, 1, 0.5f), CCLineCap.Round);
}
public void AddTriangleVertex(CCV3F_C4B triangleVertex)
{
triangleVertices.Add(triangleVertex);
}
public override void OnEnter()
{
base.OnEnter();
CCSize windowSize = Layer.VisibleBoundsWorldspace.Size;
var line = new CCDrawNode();
line.DrawLine(new CCPoint(0, windowSize.Height / 2), new CCPoint(windowSize.Width, windowSize.Height / 2), 10);
AddChild(line, 0);
byte alpha = 100; // 255 is full opacity
var green = new CCColor4B(0, 255, 0, alpha);
CCV3F_C4B[] verts = new CCV3F_C4B[] {
new CCV3F_C4B( new CCPoint(0,0), green),
new CCV3F_C4B( new CCPoint(30,60), green),
new CCV3F_C4B( new CCPoint(60,0), green)
};
triangleList1.DrawTriangleList (verts);
triangleList1.Position = windowSize.Center;
triangleList1.PositionX -= windowSize.Width / 4;
triangleList1.PositionY -= triangleList1.ContentSize.Center.Y;
// Because the default BlendFunc of our DrawNode is AlphaBlend we need
// to pass the colors as pre multiplied alpha.
var greenPreMultiplied = green;
greenPreMultiplied.G = (byte)(greenPreMultiplied.G * alpha / 255.0f);
verts[0].Colors = greenPreMultiplied;
verts[1].Colors = greenPreMultiplied;
verts[2].Colors = greenPreMultiplied;
triangleList2.DrawTriangleList (verts);
triangleList2.Position = windowSize.Center;
triangleList2.PositionX += windowSize.Width / 4;
triangleList2.PositionY -= triangleList2.BoundingRect.Size.Height / 2;
}
public void AddLineVertex (CCV3F_C4B lineVertex)
{
lineVertices.Add(lineVertex);
dirty = true;
}
public void AddTriangleVertex (CCV3F_C4B triangleVertex)
{
triangleVertices.Add (triangleVertex);
}