public void MakeTreeScene()
{
Configuration.idBuffer = false;
#if DEBUG
float size = 40.0f;
#else
float size = 40.0f;
#endif
Reset();
AddFloor(size, 5, -0.5f);
var tree1 = new TreeTemplate(22, 0, 4, 3.0f, 0.6f, 0.6f);
var tree2 = new TreeTemplate(26, 0, 6, 7.0f, 1.0f, 0.6f);
Random r = new Random();
List <Vector2> positions = UniformPoissonDiskSampler.SampleCircle(Vector2.Zero, size / 2.0f, 3.0f);
foreach (var pos in positions)
{
Vector3 p3d = new Vector3(pos.X, 0.0f, pos.Y);
//Vector3 p3d = new Vector3(0.0, 0.0f, 0.0);
double type = r.NextDouble();
if (type > 0.5)
{
MakeTree(p3d, tree1);
}
else
{
MakeTree(p3d, tree2);
}
}
AddCameras();
AddCameraUserControls();
}
// http://developer.dev.nvidia.com/node/35?display=default
// http://read.pudn.com/downloads105/sourcecode/windows/opengl/433841/DEMOS/OpenGL/src/simple_soft_shadows/simple_soft_shadows.cpp__.htm
#if false // \bug OpenGL spec file or OpenTK bug
private void CreateJitterTexture()
{
List <Vector2> samples = null;
Random random = new Random();
int jitterSize = 32;
int jitterSamples = 64;
int width = jitterSize;
int height = jitterSize;
//int depth = jitterSamples * jitterSamples / 2;
int depth = jitterSamples / 2;
int texelPitch = 4;
int rowPitch = width * texelPitch;
int slicePitch = rowPitch * height;
byte[] data = new byte[width * height * depth * texelPitch];
Texture texture = new Texture(
width,
height,
depth, PixelFormat.Rgba,
PixelInternalFormat.SignedRgba8
);
double[] v = new double[4];
double[] d = new double[4];
float startDistance = 0.5f;
for (int i = 0; i < jitterSize; ++i)
{
for (int j = 0; j < jitterSize; ++j)
{
double rot_offset = random.NextDouble() * 2 * 3.1415926;
float distance = startDistance;
for (int count = 0; count < jitterSamples; distance = distance * 0.95f)
{
samples = UniformPoissonDiskSampler.SampleCircle(Vector2.Zero, 1.0f, distance);
count = samples.Count;
}
startDistance = distance / 0.95f;
for (int k = 0; k < jitterSamples / 2; ++k)
{
data[k * slicePitch + j * rowPitch + i * 4 + 0] = (byte)(samples[k * 2 + 0].X * 255);
data[k * slicePitch + j * rowPitch + i * 4 + 1] = (byte)(samples[k * 2 + 0].Y * 255);
data[k * slicePitch + j * rowPitch + i * 4 + 2] = (byte)(samples[k * 2 + 1].X * 255);
data[k * slicePitch + j * rowPitch + i * 4 + 3] = (byte)(samples[k * 2 + 1].Y * 255);
}
#if false
for (int k = 0; k < jitterSamples * jitterSamples / 2; ++k)
{
int x, y;
x = k % (jitterSamples / 2);
y = (jitterSamples - 1) - k / (jitterSamples / 2);
v[0] = (double)(x * 2 + 0.5) / jitterSamples;
v[1] = (double)(y + 0.5) / jitterSamples;
v[2] = (double)(x * 2 + 1 + 0.5) / jitterSamples;
v[3] = v[1];
// jitter
v[0] += random.NextDouble() * 2 / jitterSamples;
v[1] += random.NextDouble() * 2 / jitterSamples;
v[2] += random.NextDouble() * 2 / jitterSamples;
v[3] += random.NextDouble() * 2 / jitterSamples;
// warp to disk
d[0] = Math.Sqrt(v[1]) * Math.Cos(2 * 3.1415926 * v[0] + rot_offset);
d[1] = Math.Sqrt(v[1]) * Math.Sin(2 * 3.1415926 * v[0] + rot_offset);
d[2] = Math.Sqrt(v[3]) * Math.Cos(2 * 3.1415926 * v[2] + rot_offset);
d[3] = Math.Sqrt(v[3]) * Math.Sin(2 * 3.1415926 * v[2] + rot_offset);
d[0] = (d[0] + 1.0) / 2.0;
d[1] = (d[1] + 1.0) / 2.0;
d[2] = (d[2] + 1.0) / 2.0;
d[3] = (d[3] + 1.0) / 2.0;
data[k * slicePitch + j * rowPitch + i * 4 + 0] = (byte)(d[0] * 255);
data[k * slicePitch + j * rowPitch + i * 4 + 1] = (byte)(d[1] * 255);
data[k * slicePitch + j * rowPitch + i * 4 + 2] = (byte)(d[2] * 255);
data[k * slicePitch + j * rowPitch + i * 4 + 3] = (byte)(d[3] * 255);
}
#endif
}
}
texture.Upload(data, 0);
texture.Wrap = TextureWrapMode.Repeat;
renderer.GlobalParameters["jittermap"] = texture;
}
