public OceanWaterData(RenderSystem rs, int size, float lat)
{
this.Size = size;
geoData = new GeomentryData();
ObjectFactory fac = rs.ObjectFactory;
vtxDecl = fac.CreateVertexDeclaration(WaterVertex.Elements);
int len = size - 1;
int vertexCount = size * size;
vertexBuffer = fac.CreateVertexBuffer(vertexCount, vtxDecl, BufferUsage.Static);
float rad10 = PlanetEarth.DefaultTileSpan;
float radtl = MathEx.Degree2Radian(lat);
#region 顶点数据
WaterVertex[] vtxArray = new WaterVertex[vertexCount];
float cellAngle = rad10 / (float)len;
float invSize = 1 / (float)size;
// i为经度方向
for (int i = 0; i < size; i++)
{
// j为纬度方向
for (int j = 0; j < size; j++)
{
Vector3 pos = PlanetEarth.GetPosition(j * cellAngle, radtl - i * cellAngle);
pos.Normalize();
pos *= PlanetEarth.PlanetRadius;
int index = i * size + j;
vtxArray[index].Position = pos;
vtxArray[index].NormalCoord = new Vector2(i * invSize, j * invSize); // = index;
}
}
vertexBuffer.SetData <WaterVertex>(vtxArray);
#endregion
#region 索引数据
int indexCount = MathEx.Sqr(len) * 2 * 3;
int[] indexArray = new int[indexCount];
indexBuffer = fac.CreateIndexBuffer(IndexBufferType.Bit32, indexCount, BufferUsage.WriteOnly);
for (int i = 0, index = 0; i < len; i++)
{
for (int j = 0; j < len; j++)
{
int x = i;
int y = j;
indexArray[index++] = y * size + x;
indexArray[index++] = y * size + (x + 1);
indexArray[index++] = (y + 1) * size + (x + 1);
indexArray[index++] = y * size + x;
indexArray[index++] = (y + 1) * size + (x + 1);
indexArray[index++] = (y + 1) * size + x;
}
}
indexBuffer.SetData <int>(indexArray);
#endregion
#region 构造GeomentryData
geoData = new GeomentryData();
geoData.VertexDeclaration = vtxDecl;
geoData.VertexSize = WaterVertex.Size;
geoData.VertexBuffer = vertexBuffer;
geoData.IndexBuffer = indexBuffer;
geoData.PrimCount = MathEx.Sqr(len) * 2;
geoData.VertexCount = MathEx.Sqr(size);
geoData.PrimitiveType = RenderPrimitiveType.TriangleList;
geoData.BaseVertex = 0;
#endregion
}
public OceanWaterData(RenderSystem rs, int size, float lat)
{
this.Size = size;
geoData = new GeomentryData();
ObjectFactory fac = rs.ObjectFactory;
vtxDecl = fac.CreateVertexDeclaration(WaterVertex.Elements);
int len = size - 1;
int vertexCount = size * size;
vertexBuffer = fac.CreateVertexBuffer(vertexCount, vtxDecl, BufferUsage.Static);
float rad10 = PlanetEarth.DefaultTileSpan;
float radtl = MathEx.Degree2Radian(lat);
#region 顶点数据
WaterVertex[] vtxArray = new WaterVertex[vertexCount];
float cellAngle = rad10 / (float)len;
float invSize = 1 / (float)size;
// i为经度方向
for (int i = 0; i < size; i++)
{
// j为纬度方向
for (int j = 0; j < size; j++)
{
Vector3 pos = PlanetEarth.GetPosition(j * cellAngle, radtl - i * cellAngle);
pos.Normalize();
pos *= PlanetEarth.PlanetRadius;
int index = i * size + j;
vtxArray[index].Position = pos;
vtxArray[index].NormalCoord = new Vector2(i * invSize, j * invSize); // = index;
}
}
vertexBuffer.SetData<WaterVertex>(vtxArray);
#endregion
#region 索引数据
int indexCount = MathEx.Sqr(len) * 2 * 3;
int[] indexArray = new int[indexCount];
indexBuffer = fac.CreateIndexBuffer(IndexBufferType.Bit32, indexCount, BufferUsage.WriteOnly);
for (int i = 0, index = 0; i < len; i++)
{
for (int j = 0; j < len; j++)
{
int x = i;
int y = j;
indexArray[index++] = y * size + x;
indexArray[index++] = y * size + (x + 1);
indexArray[index++] = (y + 1) * size + (x + 1);
indexArray[index++] = y * size + x;
indexArray[index++] = (y + 1) * size + (x + 1);
indexArray[index++] = (y + 1) * size + x;
}
}
indexBuffer.SetData<int>(indexArray);
#endregion
#region 构造GeomentryData
geoData = new GeomentryData();
geoData.VertexDeclaration = vtxDecl;
geoData.VertexSize = WaterVertex.Size;
geoData.VertexBuffer = vertexBuffer;
geoData.IndexBuffer = indexBuffer;
geoData.PrimCount = MathEx.Sqr(len) * 2;
geoData.VertexCount = MathEx.Sqr(size);
geoData.PrimitiveType = RenderPrimitiveType.TriangleList;
geoData.BaseVertex = 0;
#endregion
}
