public void DrawSquare(
HSBColor idColor,
Matrix world,
Vector3 pt0,
Vector3 pt1,
Vector3 pt2,
Vector3 pt3)
{
var rgba = idColor.ToColor();
var temp = (VertexPositionColorTexture[])unitSquare.Clone();
temp[0].Position = pt0;
temp[0].Color = rgba;
temp[1].Position = pt1;
temp[1].Color = rgba;
temp[2].Position = pt2;
temp[2].Color = rgba;
temp[3].Position = pt0;
temp[3].Color = rgba;
temp[4].Position = pt2;
temp[4].Color = rgba;
temp[5].Position = pt3;
temp[5].Color = rgba;
this.worldMatrix.SetValue(world);
this.shapesEffect.CurrentTechnique = this.squareTechnique;
foreach (
EffectPass pass in
this.shapesEffect.CurrentTechnique.Passes
)
{
pass.Apply();
this.device.DrawUserPrimitives(
PrimitiveType.TriangleList,
temp,
0,
2
);
}
}
public TrunkNode(
NodeDNA dna,
Vector3 origin,
int depth,
float angle,
float width)
{
this.dna = dna;
this.origin = origin;
this.color = HSBColors.Brown; //makeIDColor(dna, 0);
this.angle = angle;
this.depth = depth;
this.width = width;
this.length =
this.width *
MathHelper.Lerp(
MinTrunkLengthScale,
MaxTrunkLengthScale,
dna.Bushiness
);
}
protected override void Draw(GameTime gameTime)
{
var background = new HSBColor(0.55f, 0.1f, 1f, 1);
GraphicsDevice.Clear(background.ToColor());
GraphicsDevice.RasterizerState = RasterizerState.CullNone;
GraphicsDevice.BlendState = BlendState.AlphaBlend;
Matrix view = Matrix.CreateLookAt(
new Vector3(0, 0, -10),
new Vector3(0, 0, 0),
Vector3.UnitY) * Matrix.CreateScale(0.75f);
Matrix projection = Matrix.CreateOrthographic(
GraphicsDevice.Viewport.Width,
GraphicsDevice.Viewport.Height,
0.0f,
100.0f);
this.drawingContext.View = view;
this.drawingContext.Projection = projection;
this.node.Draw(this.drawingContext);
}
public Node(Node parent, float childPct)
{
this.id = NextID++;
this.parent = parent;
if (parent != null)
{
this.depth = parent.depth + 1;
this.dna = parent.dna;
// As a child, offset the child index
var skew = (float)Math.Pow(this.dna.AngleSkew - .5f, 3);
var spread = (2f * this.dna.Bushiness);
this.baseAngle = parent.angle + spread * (childPct - .5f) + skew;
this.baseAngle +=
this.dna.Wiggle * .1f * MathF.Sin(this.depth) * this.depth;
// Set the position relative to the parent
var mult = 15 - 12 * this.dna.Bushiness;
this.branchLength = .7f * mult * parent.radius;
this.branchLength *=
(1 + 1 * this.dna.Variation * (NodeDNA.NextFloat() - .5f));
this.radius = parent.radius * (.6f + .3f * this.dna.Shrinkage);
this.position =
MathF.PolarOffset(
parent.position,
this.branchLength,
this.baseAngle
);
}
this.angle = this.baseAngle;
this.idColor = makeIDColor(this.dna, this.depth);
}
public void DrawCircle(HSBColor idColor, Vector3 position, float radius)
{
// TODO: Batch/cache.
var rgba = idColor.ToColor();
var temp = (VertexPositionColorTexture[])unitSquare.Clone();
for (int i = 0; i < temp.Length; i++)
{
temp[i].Color = rgba;
}
Matrix world =
Matrix.CreateScale(radius * 2) *
Matrix.CreateTranslation(position);
this.worldMatrix.SetValue(world);
this.shapesEffect.CurrentTechnique = this.circleTechnique;
foreach (EffectPass pass in this.shapesEffect.CurrentTechnique.Passes)
{
pass.Apply();
this.device.DrawUserPrimitives(
PrimitiveType.TriangleList, temp, 0, 2);
}
}
public void Draw(DrawingContext context)
{
foreach (var child in this.children)
{
Vector3 edge = child.position - position;
float length = child.branchLength;
float angle = (float)Math.Atan2(edge.Y, edge.X);
Matrix world = Matrix.CreateRotationZ(angle) *
Matrix.CreateTranslation(this.position);
context.DrawSquare(
this.idColor,
world,
new Vector3(0, -this.radius, 0),
new Vector3(0, +this.radius, 0),
new Vector3(length, +child.radius, 0),
new Vector3(length, -child.radius, 0)
);
var leafCount = (float)Math.Floor(this.dna.LeafCount * 5);
for (var j = 0; j < (int)leafCount; j++)
{
HSBColor leafColor = this.idColor.Alter(
shade: 0.3f * MathF.Sin(j + this.depth),
fade: -0.3f + 0.2f * MathF.Sin(j + this.depth)
);
world =
Matrix.CreateTranslation(length / leafCount, 0, 0) *
world;
var r0 = 15 * this.radius * (.3f + this.dna.LeafAspect);
var r1 = r0 * (.7f * this.dna.LeafShape + .12f);
var theta = MathF.Sin(j * 3 + this.depth);
var dTheta = 1 / (.8f + 2 * this.dna.LeafAspect);
var theta0 = theta - dTheta;
var theta1 = theta + dTheta;
context.DrawSquare(
leafColor,
world,
new Vector3(0, 0, 0),
new Vector3(
r1 * MathF.Cos(theta0),
r1 * MathF.Sin(theta),
0
),
new Vector3(
r0 * MathF.Cos(theta),
r0 * MathF.Sin(theta),
0
),
new Vector3(
r1 * MathF.Cos(theta1),
r1 * MathF.Sin(theta1),
0
)
);
}
child.Draw(context);
}
context.DrawCircle(this.idColor, this.position, this.radius);
if (this.children.Count == 0)
{
Matrix world = Matrix.CreateRotationZ(this.angle) *
Matrix.CreateTranslation(this.position);
var flowerCount = (float)Math.Round(8 * this.dna.FlowerCount);
var petalSize = 5 * this.radius;
var aspect = .1f + .9f * this.dna.PetalAspect;
var petalH = petalSize * aspect;
var petalW = petalSize * (1 - aspect);
for (var i = 0; i < flowerCount; i++)
{
var flowerColor = new HSBColor(
(this.dna.FlowerHue * 1.2f + .9f) % 1f,
this.dna.FlowerSaturation,
MathF.Unit(.9f + .3f * MathF.Sin(i * 3)),
.7f
);
world =
Matrix.CreateRotationZ(MathHelper.TwoPi / flowerCount) *
world;
var flowerCenter = Vector3.Transform(
new Vector3(petalH * 1.5f, 0, 0),
world
);
context.DrawElipse(
flowerColor,
flowerCenter,
petalH,
petalW
);
}
}
}