/// <summary>
/// Calcular OBB a partir de un conjunto de puntos.
/// Prueba todas las orientaciones entre initValues y endValues, saltando de angulo en cada intervalo segun step
/// Continua recursivamente hasta llegar a un step menor a 0.01f
/// </summary>
/// <returns></returns>
private static OBBStruct computeFromPointsRecursive(Vector3[] points, Vector3 initValues, Vector3 endValues,
float step)
{
var minObb = new OBBStruct();
var minVolume = float.MaxValue;
var minInitValues = Vector3.Empty;
var minEndValues = Vector3.Empty;
var transformedPoints = new Vector3[points.Length];
float x, y, z;
x = initValues.X;
while (x <= endValues.X)
{
y = initValues.Y;
var rotX = FastMath.ToRad(x);
while (y <= endValues.Y)
{
z = initValues.Z;
var rotY = FastMath.ToRad(y);
while (z <= endValues.Z)
{
//Matriz de rotacion
var rotZ = FastMath.ToRad(z);
var rotM = Matrix.RotationYawPitchRoll(rotY, rotX, rotZ);
Vector3[] orientation =
{
new Vector3(rotM.M11, rotM.M12, rotM.M13),
new Vector3(rotM.M21, rotM.M22, rotM.M23),
new Vector3(rotM.M31, rotM.M32, rotM.M33)
};
//Transformar todos los puntos a OBB-space
for (var i = 0; i < transformedPoints.Length; i++)
{
transformedPoints[i].X = Vector3.Dot(points[i], orientation[0]);
transformedPoints[i].Y = Vector3.Dot(points[i], orientation[1]);
transformedPoints[i].Z = Vector3.Dot(points[i], orientation[2]);
}
//Obtener el AABB de todos los puntos transformados
var aabb = TgcBoundingAxisAlignBox.computeFromPoints(transformedPoints);
//Calcular volumen del AABB
var extents = aabb.calculateAxisRadius();
extents = TgcVectorUtils.abs(extents);
var volume = extents.X * 2 * extents.Y * 2 * extents.Z * 2;
//Buscar menor volumen
if (volume < minVolume)
{
minVolume = volume;
minInitValues = new Vector3(x, y, z);
minEndValues = new Vector3(x + step, y + step, z + step);
//Volver centro del AABB a World-space
var center = aabb.calculateBoxCenter();
center = center.X * orientation[0] + center.Y * orientation[1] + center.Z * orientation[2];
//Crear OBB
minObb.center = center;
minObb.extents = extents;
minObb.orientation = orientation;
}
z += step;
}
y += step;
}
x += step;
}
//Recursividad en mejor intervalo encontrado
if (step > 0.01f)
{
minObb = computeFromPointsRecursive(points, minInitValues, minEndValues, step / 10f);
}
return(minObb);
}
public void Init()
{
// Inicializo las Escalas
SceneScaleY = 3 * 40f;
SceneScaleXZ = 30 * 400f;
//Cargar Heightmap y textura de la Escena
HeightmapSize = new Bitmap(sceneHeightmapPath);
terrainCenter = new Vector3(0, 0, 0);
terrain = new TerrenoCustom();
terrain.AlphaBlendEnable = true;
terrain.loadHeightmap(sceneHeightmapPath, SceneScaleXZ, SceneScaleY, terrainCenter);
terrain.loadTexture(terrainTexturePath);
// Creo el agua
effectAgua = TgcShaders.loadEffect(env.ShadersDir + "BasicShader.fx");
mar = new TerrenoCustom();
mar.AlphaBlendEnable = true;
mar.loadHeightmap(marHeightmapPath, 9 * SceneScaleXZ, 2 * SceneScaleY, new Vector3(0, -200, 0));
mar.loadTexture(marTexturePath);
mar.Effect = effectAgua;
mar.Technique = "RenderScene";
laguna = new TerrenoCustom();
laguna.AlphaBlendEnable = true;
laguna.loadHeightmap(lagunaHeightmapPath, SceneScaleXZ / 4, SceneScaleY / 2, new Vector3(10, 10, 40));
laguna.loadTexture(lagunaTexturePath);
laguna.Effect = effectAgua;
laguna.Technique = "RenderLaguna";
// Creo el SkyBox
CreateSkyBox();
// La ubicacion de los Mesh es en coordenadas Originales del HeightMap (sin escalado) [-128,128]
SceneMeshes = new List <TgcMesh>();
Destroyables = new List <ObjetoEscena>();
loader = new TgcSceneLoader();
rockModel = new Roca(env);
//CreateObjectsFromModel(rockModel.mesh, 100, new Vector3(0, 0, 0), new Vector3(0.9f, 0.9f, 0.9f), (HeightmapSize.Width / 3), new float[] { 30f, 35f, 40f, 45f });
CreateObjectsFromModel(rockModel.mesh, 300, new Vector3(0, 0, 0), new Vector3(0.9f, 1.3f, 1.7f), (HeightmapSize.Width / 2) - 10, new float[] { 30f, 35f, 40f, 45f });
palmModel = new Palmera(env);
//CreateObjectsFromModel(palmModel.mesh, 50, new Vector3((HeightmapSize.Width / 5)*-1, 0, 0), new Vector3(0.5f, 0.5f, 0.5f), (HeightmapSize.Width / 3), new float[] { 60f, 65f, 70f, 75f });
//CreateObjectsFromModel(palmModel.mesh, 50, new Vector3((HeightmapSize.Width / 6), 0, (HeightmapSize.Width / 6)), new Vector3(0.5f, 0.5f, 0.5f), (HeightmapSize.Width / 6) * 2, new float[] { 60f, 65f, 70f, 75f });
CreateObjectsFromModel(palmModel.mesh, 300, new Vector3(0, 0, 0), new Vector3(0.5f, 0.7f, 0.9f), (HeightmapSize.Width / 2) - 10, new float[] { 60f, 65f, 70f, 75f });
//arbolModel = new Arbol(env);
//CreateObjectsFromModel(arbolModel.mesh, 30, new Vector3(10, 0, 10), new Vector3(0.8f, 0.8f, 0.8f), 20, new float[] { 50f, 55f, 60f, 65f });
frutaModel = new Fruta(env);
CreateObjectsFromModel(frutaModel.mesh, 150, new Vector3(0, 0, 0), new Vector3(0.8f, 0.8f, 0.8f), (HeightmapSize.Width / 2) - 10, new float[] { 2f, 2f, 2f, 2f });
pinoModel = new Pino(env);
//CreateObjectsFromModel(pinoModel.mesh, 100, new Vector3((HeightmapSize.Width / 4), 0, 0), new Vector3(0.8f, 0.8f, 0.8f), (HeightmapSize.Width / 4)-10, new float[] { 50, 55f, 60f, 65f });
//CreateObjectsFromModel(pinoModel.mesh, 100, new Vector3(0, 0, (HeightmapSize.Width / 4)), new Vector3(0.8f, 0.8f, 0.8f), (HeightmapSize.Width / 4)-10, new float[] { 50, 55f, 60f, 65f });
CreateObjectsFromModel(pinoModel.mesh, 100, new Vector3(0, 0, 0), new Vector3(0.8f, 0.9f, 1.1f), (HeightmapSize.Width / 2) - 10, new float[] { 50, 55f, 60f, 65f });
//plantModel = loader.loadSceneFromFile(plantMeshPath).Meshes[0];
//CreateObjectsFromModel(plantModel, 70, new Vector3(75, 0, -75), new Vector3(0.8f, 0.8f, 0.8f), 75, new float[] { 50f, 55f, 60f, 65f });
//palm2Model = loader.loadSceneFromFile(palm2MeshPath).Meshes[0];
//CreateObjectsFromModel(palm2Model, 70, new Vector3(-20, 0, -50), new Vector3(0.8f, 0.8f, 0.8f), 80, new float[] { 10f, 15f, 20f, 25f });
//arbolFrutalModel = loader.loadSceneFromFile(arbolFrutalMeshPath).Meshes[0];
//CreateObjectsFromModel(arbolFrutalModel, 30, new Vector3(-75, 0, 75), new Vector3(0.8f, 0.8f, 0.8f), 50, new float[] { 50, 55f, 60f, 65f });
//palm3Model = loader.loadSceneFromFile(palm3MeshPath).Meshes[0];
//CreateObjectsFromModel(palm3Model, 70, new Vector3(-10, 0, -60), new Vector3(0.8f, 0.8f, 0.8f), 80, new float[] { 10f, 15f, 20f, 25f });
var fogataModel = loader.loadSceneFromFile(fogataPath);
fogata = fogataModel.Meshes[0];
fogata.AutoTransformEnable = true;
fogata.Scale = new Vector3(30f, 30f, 30f);
fogata.Position = new Vector3(0, 0, 0);
fogata.AlphaBlendEnable = true;
fogata.Enabled = true;
// Inicializo el Fuego
emisorFuego = new ParticleEmitter(env.MediaDir + "Fogata2\\fuego.png", 30);
emisorFuego.Position = new Vector3(0, 0, 0);
emisorFuego.MinSizeParticle = 5.5f;
emisorFuego.MaxSizeParticle = 10f;
emisorFuego.ParticleTimeToLive = 1.5f;
emisorFuego.CreationFrecuency = 0.25f;
emisorFuego.Dispersion = 50;
emisorFuego.Speed = new Vector3(50f, 50f * SceneScaleY, 50f);
//Crear Quadtree: Defino el BoundinBox del Escenario
triangle = new CustomVertex.PositionColored[5];
triangle[0] = new CustomVertex.PositionColored((HeightmapSize.Width / 2) * -1 * SceneScaleXZ, 0, 0, Color.Green.ToArgb());
triangle[1] = new CustomVertex.PositionColored(0, 0, (HeightmapSize.Width / 2) * SceneScaleXZ, Color.Green.ToArgb());
triangle[2] = new CustomVertex.PositionColored(0, (HeightmapSize.Width) * SceneScaleY, 0, Color.Green.ToArgb());
triangle[3] = new CustomVertex.PositionColored((HeightmapSize.Width / 2) * SceneScaleXZ, 0, 0, Color.Green.ToArgb());
triangle[4] = new CustomVertex.PositionColored(0, 0, (HeightmapSize.Width / 2) * -1 * SceneScaleXZ, Color.Green.ToArgb());
terrainBoundingBox =
TgcBoundingAxisAlignBox.computeFromPoints(new[]
{ triangle[0].Position, triangle[1].Position, triangle[2].Position, triangle[3].Position, triangle[4].Position });
quadtree = new Quadtree();
quadtree.create(SceneMeshes, terrainBoundingBox);
quadtree.createDebugQuadtreeMeshes();
}
