public override void Render()
{
VideoDriver driver = _mgr.VideoDriver;
CameraSceneNode camera = _mgr.ActiveCamera;
if (camera == null || driver == null)
return;
if (!redrawnextloop)
{
driver.SetTransform(TransformationState.World, AbsoluteTransformation);
driver.SetMaterial(_material);
driver.DrawIndexedTriangleList(Vertices, lastdrawcount * 4,
Indices, lastdrawcount * 4);
}
else
{
ReallocateBuffers();
Vector3D campos = camera.AbsolutePosition;
Box3D cbox = camera.ViewFrustum.BoundingBox;
Vector3D pos = Position;
int drawcount = 0;
int max = (Particles.Length < MaxDensity) ? Particles.Length : MaxDensity;
double d = pos.DistanceFrom(campos) / GRASS_PATCH_SIZE;
if (d > 1.0)
max = (int)(max / d);
//Matrix4 m = new Matrix4();
for (int i = 0; i < max; i++)
{
int idx = drawcount * 4;
GrassParticle particle = Particles[i];
Vector3D gpos = particle.pos + pos;
double dist = campos.DistanceFromSQ(gpos);
if (dist > NewMath.Sqr(DrawDistance))
continue;
if (!cbox.IsPointInside(gpos))
continue;
if (dist > NewMath.Sqr(DrawDistance * 0.5))
{
if (particle.sprite.Height == 0)
{
float i1 = ((float)i) / ((float)max);
float i2 = ((float)(dist / DrawDistance)) / 2f;
if (i1 < i2)
continue;
}
}
int igridsize = GRASS_PATCH_SIZE / (int)WindRes;
int ihalfres = (int)WindRes / 2;
int xgrid = (int)(particle.pos.X / (igridsize) + ihalfres);
int zgrid = (int)(particle.pos.Z / (igridsize) + ihalfres);
float xnext = particle.pos.X / ((float)GRASS_PATCH_SIZE / (float)WindRes) + (WindRes / 2f) - xgrid;
float znext = particle.pos.Z / ((float)GRASS_PATCH_SIZE / (float)WindRes) + (WindRes / 2f) - zgrid;
Vector2D wind1 = WindGrid[xgrid * WindRes + zgrid];
Vector2D wind2 = WindGrid[(xgrid + 1) * WindRes + zgrid];
Vector2D wind3 = WindGrid[xgrid * (WindRes + 1) + zgrid];
Vector2D wind4 = WindGrid[(xgrid + 1) * (WindRes + 1) + zgrid];
Vector2D wind2d = wind1 * (1.0f - xnext) * (1.0f - znext) +
wind2 * xnext * (1.0f - znext) +
wind3 * (1.0f - xnext) * znext +
wind4 * xnext * znext;
wind2d *= particle.flex;
Vector3D wind = new Vector3D(wind2d.X, 0f, wind2d.Y);
Color gcol = new Color(particle.color.A,
(int)(particle.color.R * 0.8f),
(int)(particle.color.G * 0.8f),
(int)(particle.color.B * 0.8f));
Vertices[0 + idx].Position = particle.points[0];
Vertices[0 + idx].Color = gcol;
Vertices[1 + idx].Position = particle.points[1] + wind;
Vertices[1 + idx].Color = particle.color;
Vertices[2 + idx].Position = particle.points[2] + wind;
Vertices[2 + idx].Color = particle.color;
Vertices[3 + idx].Position = particle.points[3];
Vertices[3 + idx].Color = gcol;
int arrpos = (_imagecount.Width * particle.sprite.Height) + particle.sprite.Width;
Vertices[0 + idx].TCoords = new Vector2D(v1[arrpos], v2[arrpos]);
Vertices[1 + idx].TCoords = new Vector2D(v1[arrpos], v3[arrpos]);
Vertices[2 + idx].TCoords = new Vector2D(v4[arrpos], v3[arrpos]);
Vertices[3 + idx].TCoords = new Vector2D(v4[arrpos], v2[arrpos]);
drawcount++;
}
driver.SetTransform(TransformationState.World, AbsoluteTransformation);
driver.SetMaterial(_material);
driver.DrawIndexedTriangleList(Vertices, drawcount * 4,
Indices, drawcount * 4);
lastdrawcount = drawcount;
}
if (DebugDataVisible == DebugSceneType.BoundingBox)
{
driver.SetTransform(TransformationState.World, AbsoluteTransformation);
Material m = new Material();
m.Lighting = false;
driver.SetMaterial(m);
driver.Draw3DBox(BoundingBox, Color.From(0, 255, 255, 255));
Box3D b2 = new Box3D();
b2.AddInternalPoint(BoundingBox.MaxEdge * 0.01f);
driver.Draw3DBox(b2, Color.From(0, 255, 255, 255));
}
}
bool Create(bool save)
{
Random rand = new Random((int)((100 * gridpos.X) + gridpos.Z));
int count = rand.Next(3000, 3200);
_bbox = new Box3D();
Particles = new GrassParticle[count];
/*Matrix4 m = new Matrix4();
m.RotationDegrees = Terrain.Rotation;
m.Translation = Terrain.AbsolutePosition;
m.MakeInverse();*/
Color[,] TGMRetrieve = TerrainGrassMap.Retrieve();
Color[,] TCMRetrieve = TerrainColourMap.Retrieve();
Color[,] THMRetrieve = TerrainHeightMap.Retrieve();
System.Collections.ArrayList tosave = new System.Collections.ArrayList();
for (int i = 0; i < count; i++)
{
Particles[i].points = new Vector3D[4];
float x = rand.Next(0, GRASS_PATCH_SIZE * 10) / 10f;
float z = rand.Next(0, GRASS_PATCH_SIZE * 10) / 10f;
x -= GRASS_PATCH_SIZE / 2f;
z -= GRASS_PATCH_SIZE / 2f;
Particles[i].pos.X = x;
Particles[i].pos.Z = z;
Particles[i].flex = rand.Next(0, 100) / 100f;
Particles[i].sprite.Width = rand.Next(0, _imagecount.Width);
if (i < 30)
Particles[i].sprite.Height = rand.Next(0, _imagecount.Height);
else
Particles[i].sprite.Height = 0;
Vector3D p = Position + Particles[i].pos;
Vector3D xz = new Vector3D(p.X / Terrain.Scale.X, 0f, p.Z / Terrain.Scale.Z);
int x1 = (int)Math.Floor(xz.X);
int z1 = (int)Math.Floor(xz.Z);
if (x1 < 1 ||
z1 < 1 ||
x1 > TerrainHeightMap.OriginalSize.Width - 1 ||
z1 > TerrainHeightMap.OriginalSize.Height - 1)
continue;
Color cDensity = TGMRetrieve[x1, z1];
if (rand.Next(0, 255) > cDensity.A || cDensity.A < 1)
continue;
float ay = THMRetrieve[x1, z1].B * Terrain.Scale.Y;
float by = THMRetrieve[x1 + 1, z1].B * Terrain.Scale.Y;
float cy = THMRetrieve[x1, z1 + 1].B * Terrain.Scale.Y;
float dy = THMRetrieve[x1 + 1, z1 + 1].B * Terrain.Scale.Y;
float u1 = xz.X - x1;
float v1 = xz.Z - z1;
float height = ay * (1.0f - u1) * (1.0f - v1) + by * u1 * (1.0f - v1) + cy * (1.0f - u1) * v1 + dy * u1 * v1;
Dimension2Df size = new Dimension2Df(rand.Next(40, 70), 100);
size.Height *= cDensity.B / 200f;
Particles[i].pos.Y = height + (size.Height * 0.5f);
Particles[i].color = TCMRetrieve[x1, z1];
Particles[i].startColor = TCMRetrieve[x1, z1];
_bbox.AddInternalPoint(Particles[i].pos);
Vector3D dimensions = new Vector3D(0.5f * size.Width,
-0.5f * size.Height,
0);
/*float rotation = rand.Next(0, 3600) / 10f;
Matrix4 m2 = new Matrix4();
m2.RotationDegrees = new Vector3D(0, rotation, 0);
m2.RotateVect(dimensions);*/
//Vector3D h = new Vector3D(dimensions.X,0.0f,dimensions.Z);
//Vector3D v = new Vector3D(0.0f,dimensions.Y,0.0f);
Particles[i].points[0] = Particles[i].pos + new Vector3D(dimensions.X, dimensions.Y, dimensions.Z);
Particles[i].points[1] = Particles[i].pos + new Vector3D(dimensions.X, -dimensions.Y, dimensions.Z);
Particles[i].points[2] = Particles[i].pos - new Vector3D(dimensions.X, dimensions.Y, dimensions.Z);
Particles[i].points[3] = Particles[i].pos - new Vector3D(dimensions.X, -dimensions.Y, dimensions.Z);
tosave.Add(Particles[i]);
}
Particles = (GrassParticle[])tosave.ToArray(typeof(GrassParticle));
tosave.Clear();
if (save)
return Save();
return true;
}
