public override bool CreateGeometry(RenderContext renderContext)
{
base.CreateGeometry(renderContext);
if (GeometryCreated)
{
return(true);
}
GeometryCreated = true;
if (uvMultiple == 256)
{
if (dataset.DataSetType == ImageSetType.Earth || dataset.DataSetType == ImageSetType.Planet)
{
subDivisionLevel = Math.Max(2, (6 - Level) * 2);
}
}
for (int i = 0; i < 4; i++)
{
RenderTriangleLists[i] = new List <RenderTriangle>();
}
// try
{
double lat, lng;
int index = 0;
double tileDegrees = 360 / (Math.Pow(2, this.Level));
latMin = AbsoluteMetersToLatAtZoom(tileY * 256, Level);
latMax = AbsoluteMetersToLatAtZoom((tileY + 1) * 256, Level);
lngMin = (((double)this.tileX * tileDegrees) - 180.0);
lngMax = ((((double)(this.tileX + 1)) * tileDegrees) - 180.0);
double latCenter = AbsoluteMetersToLatAtZoom(((tileY * 2) + 1) * 256, Level + 1);
TopLeft = (Vector3d)GeoTo3d(latMin, lngMin, false);
BottomRight = (Vector3d)GeoTo3d(latMax, lngMax, false);
TopRight = (Vector3d)GeoTo3d(latMin, lngMax, false);
BottomLeft = (Vector3d)GeoTo3d(latMax, lngMin, false);
PositionTexture[] verts = new PositionTexture[(subDivisionLevel + 1) * (subDivisionLevel + 1)];
tileDegrees = lngMax - lngMin;
double dGrid = (tileDegrees / subDivisionLevel);
int x1, y1;
double textureStep = 1.0f / subDivisionLevel;
double latDegrees = latMax - latCenter;
for (y1 = 0; y1 < subDivisionLevel / 2; y1++)
{
if (y1 != subDivisionLevel / 2)
{
lat = latMax - (2 * textureStep * latDegrees * (double)y1);
}
else
{
lat = latCenter;
}
for (x1 = 0; x1 <= subDivisionLevel; x1++)
{
if (x1 != subDivisionLevel)
{
lng = lngMin + (textureStep * tileDegrees * (double)x1);
}
else
{
lng = lngMax;
}
index = y1 * (subDivisionLevel + 1) + x1;
verts[index] = new PositionTexture();
verts[index].Position = (Vector3d)GeoTo3dWithAlt(lat, lng, false, true);// Add Altitude mapping here
verts[index].Tu = (x1 * textureStep) * Tile.uvMultiple;
verts[index].Tv = ((AbsoluteLatToMetersAtZoom(lat, Level) - (tileY * 256)) / 256f) * Tile.uvMultiple;
demIndex++;
}
}
latDegrees = latMin - latCenter;
for (y1 = subDivisionLevel / 2; y1 <= subDivisionLevel; y1++)
{
if (y1 != subDivisionLevel)
{
lat = latCenter + (2 * textureStep * latDegrees * (double)(y1 - (subDivisionLevel / 2)));
}
else
{
lat = latMin;
}
for (x1 = 0; x1 <= subDivisionLevel; x1++)
{
if (x1 != subDivisionLevel)
{
lng = lngMin + (textureStep * tileDegrees * (double)x1);
}
else
{
lng = lngMax;
}
index = y1 * (subDivisionLevel + 1) + x1;
verts[index] = new PositionTexture();
verts[index].Position = (Vector3d)GeoTo3dWithAlt(lat, lng, false, true);// Add Altitude mapping here
verts[index].Tu = (x1 * textureStep) * Tile.uvMultiple;
verts[index].Tv = ((AbsoluteLatToMetersAtZoom(lat, Level) - (tileY * 256)) / 256f) * Tile.uvMultiple;
demIndex++;
}
}
if (tileY == 0)
{
// Send the tops to the pole to fill in the Bing Hole
y1 = subDivisionLevel;
for (x1 = 0; x1 <= subDivisionLevel; x1++)
{
index = y1 * (subDivisionLevel + 1) + x1;
verts[index].Position = Vector3d.Create(0, 1, 0);
}
}
if (tileY == Math.Pow(2, Level) - 1)
{
// Send the tops to the pole to fill in the Bing Hole
y1 = 0;
for (x1 = 0; x1 <= subDivisionLevel; x1++)
{
index = y1 * (subDivisionLevel + 1) + x1;
verts[index].Position = Vector3d.Create(0, -1, 0);
}
}
TriangleCount = (subDivisionLevel) * (subDivisionLevel) * 2;
int quarterDivisions = subDivisionLevel / 2;
int part = 0;
if (renderContext.gl == null)
{
for (int y2 = 0; y2 < 2; y2++)
{
for (int x2 = 0; x2 < 2; x2++)
{
index = 0;
for (y1 = (quarterDivisions * y2); y1 < (quarterDivisions * (y2 + 1)); y1++)
{
for (x1 = (quarterDivisions * x2); x1 < (quarterDivisions * (x2 + 1)); x1++)
{
//index = ((y1 * quarterDivisions * 6) + 6 * x1);
// First triangle in quad
PositionTexture p1;
PositionTexture p2;
PositionTexture p3;
p1 = verts[(y1 * (subDivisionLevel + 1) + x1)];
p2 = verts[((y1 + 1) * (subDivisionLevel + 1) + x1)];
p3 = verts[(y1 * (subDivisionLevel + 1) + (x1 + 1))];
RenderTriangle tri = RenderTriangle.Create(p1, p2, p3, texture, Level);
RenderTriangleLists[part].Add(tri);
// Second triangle in quad
p1 = verts[(y1 * (subDivisionLevel + 1) + (x1 + 1))];
p2 = verts[((y1 + 1) * (subDivisionLevel + 1) + x1)];
p3 = verts[((y1 + 1) * (subDivisionLevel + 1) + (x1 + 1))];
tri = RenderTriangle.Create(p1, p2, p3, texture, Level);
RenderTriangleLists[part].Add(tri);
}
}
part++;
}
}
}
else
{
//process vertex list
VertexBuffer = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ARRAY_BUFFER, VertexBuffer);
Float32Array f32array = new Float32Array(verts.Length * 5);
float[] buffer = (float[])(object)f32array;
index = 0;
foreach (PositionTexture pt in verts)
{
index = AddVertex(buffer, index, pt);
}
PrepDevice.bufferData(GL.ARRAY_BUFFER, f32array, GL.STATIC_DRAW);
for (int y2 = 0; y2 < 2; y2++)
{
for (int x2 = 0; x2 < 2; x2++)
{
Uint16Array ui16array = new Uint16Array(TriangleCount * 3);
UInt16[] indexArray = (UInt16[])(object)ui16array;
index = 0;
for (y1 = (quarterDivisions * y2); y1 < (quarterDivisions * (y2 + 1)); y1++)
{
for (x1 = (quarterDivisions * x2); x1 < (quarterDivisions * (x2 + 1)); x1++)
{
// First triangle in quad
indexArray[index++] = (UInt16)((y1 * (subDivisionLevel + 1) + x1));
indexArray[index++] = (UInt16)(((y1 + 1) * (subDivisionLevel + 1) + x1));
indexArray[index++] = (UInt16)((y1 * (subDivisionLevel + 1) + (x1 + 1)));
// Second triangle in quad
indexArray[index++] = (UInt16)((y1 * (subDivisionLevel + 1) + (x1 + 1)));
indexArray[index++] = (UInt16)(((y1 + 1) * (subDivisionLevel + 1) + x1));
indexArray[index++] = (UInt16)(((y1 + 1) * (subDivisionLevel + 1) + (x1 + 1)));
}
}
IndexBuffers[part] = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, IndexBuffers[part]);
PrepDevice.bufferData(GL.ELEMENT_ARRAY_BUFFER, ui16array, GL.STATIC_DRAW);
part++;
}
}
}
}
// catch
{
}
return(true);
}
public override bool CreateGeometry(RenderContext renderContext)
{
if (GeometryCreated)
{
return(true);
}
GeometryCreated = true;
base.CreateGeometry(renderContext);
if (!subDivided)
{
if (vertexList == null)
{
InitializeGrids();
}
if (uvMultiple == 256)
{
if (dataset.DataSetType == ImageSetType.Earth || dataset.DataSetType == ImageSetType.Planet)
{
subDivisionLevel = Math.Min(5, Math.Max(0, 5 - Level));
}
else
{
subDivisionLevel = Math.Min(5, Math.Max(0, 5 - Level));
}
}
else
{
if (demTile && Level > 1)
{
demArray = new float[17 * 17];
demSize = 17 * 17;
if (backslash)
{
if (backslashYIndex == null)
{
tempBackslashYIndex = new byte[demSize];
tempBackslashXIndex = new byte[demSize];
}
}
else
{
if (slashYIndex == null)
{
tempSlashYIndex = new byte[demSize];
tempSlashXIndex = new byte[demSize];
}
}
}
}
for (int i = 0; i < 4; i++)
{
int count = subDivisionLevel;
while (count-- > 1)
{
List <Triangle> newList = new List <Triangle>();
foreach (Triangle tri in childTriangleList[i])
{
tri.SubDivide(newList, vertexList);
}
childTriangleList[i] = newList;
}
}
if (renderContext.gl == null)
{
for (int i = 0; i < 4; i++)
{
RenderTriangleLists[i] = new List <RenderTriangle>();
foreach (Triangle tri in childTriangleList[i])
{
PositionTexture p1 = vertexList[tri.C];
PositionTexture p2 = vertexList[tri.B];
PositionTexture p3 = vertexList[tri.A];
RenderTriangleLists[i].Add(RenderTriangle.Create(p1, p2, p3, texture, Level));
}
}
}
else
{
//process vertex list
VertexBuffer = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ARRAY_BUFFER, VertexBuffer);
Float32Array f32array = new Float32Array(vertexList.Count * 5);
float[] buffer = (float[])(object)f32array;
int index = 0;
foreach (PositionTexture pt in vertexList)
{
if (demTile)
{
index = AddVertex(buffer, index, GetMappedVertex(pt));
demIndex++;
}
else
{
index = AddVertex(buffer, index, pt);
}
}
if (demTile)
{
if (backslash)
{
if (tempBackslashXIndex != null)
{
backslashXIndex = tempBackslashXIndex;
backslashYIndex = tempBackslashYIndex;
tempBackslashXIndex = null;
tempBackslashYIndex = null;
}
}
else
{
if (tempSlashYIndex != null)
{
slashXIndex = tempSlashXIndex;
slashYIndex = tempSlashYIndex;
tempSlashYIndex = null;
tempSlashXIndex = null;
}
}
}
PrepDevice.bufferData(GL.ARRAY_BUFFER, f32array, GL.STATIC_DRAW);
//process index list
for (int i = 0; i < 4; i++)
{
TriangleCount = childTriangleList[i].Count;
if (GetIndexBuffer(i, 0) == null)
{
Uint16Array ui16array = new Uint16Array(TriangleCount * 3);
UInt16[] indexArray = (UInt16[])(object)ui16array;
index = 0;
foreach (Triangle tri in childTriangleList[i])
{
indexArray[index++] = (UInt16)tri.C;
indexArray[index++] = (UInt16)tri.B;
indexArray[index++] = (UInt16)tri.A;
}
ProcessIndexBuffer(indexArray, i);
}
//IndexBuffers[i] = PrepDevice.createBuffer();
//PrepDevice.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, IndexBuffers[i]);
//PrepDevice.bufferData(GL.ELEMENT_ARRAY_BUFFER, ui16array, GL.STATIC_DRAW);
}
}
subDivided = true;
}
return(true);
}
public override bool CreateGeometry(RenderContext renderContext)
{
if (GeometryCreated)
{
return(true);
}
GeometryCreated = true;
for (int i = 0; i < 4; i++)
{
RenderTriangleLists[i] = new List <RenderTriangle>();
}
LatLngEdges edges = GetLatLngEdges();
TopLeft = GeoTo3dTan(edges.latMin, edges.lngMin);
BottomRight = GeoTo3dTan(edges.latMax, edges.lngMax);
TopRight = GeoTo3dTan(edges.latMin, edges.lngMax);
BottomLeft = GeoTo3dTan(edges.latMax, edges.lngMin);
Vector3d center = Vector3d.MidPoint(TopLeft, BottomRight);
Vector3d leftCenter = Vector3d.MidPoint(TopLeft, BottomLeft);
Vector3d rightCenter = Vector3d.MidPoint(TopRight, BottomRight);
Vector3d topCenter = Vector3d.MidPoint(TopLeft, TopRight);
Vector3d bottomCenter = Vector3d.MidPoint(BottomLeft, BottomRight);
if (renderContext.gl == null)
{
RenderTriangleLists[0].Add(RenderTriangle.Create(PositionTexture.CreatePos(TopLeft, 0, 0), PositionTexture.CreatePos(leftCenter, 0, .5), PositionTexture.CreatePos(topCenter, .5, 0), texture, Level));
RenderTriangleLists[0].Add(RenderTriangle.Create(PositionTexture.CreatePos(leftCenter, 0, 0.5), PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(topCenter, .5, 0), texture, Level));
RenderTriangleLists[1].Add(RenderTriangle.Create(PositionTexture.CreatePos(topCenter, .5, 0), PositionTexture.CreatePos(rightCenter, 1, .5), PositionTexture.CreatePos(TopRight, 1, 0), texture, Level));
RenderTriangleLists[1].Add(RenderTriangle.Create(PositionTexture.CreatePos(topCenter, .5, 0), PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(rightCenter, 1, .5), texture, Level));
RenderTriangleLists[2].Add(RenderTriangle.Create(PositionTexture.CreatePos(leftCenter, 0, .5), PositionTexture.CreatePos(bottomCenter, .5, 1), PositionTexture.CreatePos(center, .5, .5), texture, Level));
RenderTriangleLists[2].Add(RenderTriangle.Create(PositionTexture.CreatePos(leftCenter, 0, .5), PositionTexture.CreatePos(BottomLeft, 0, 1), PositionTexture.CreatePos(bottomCenter, .5, 1), texture, Level));
RenderTriangleLists[3].Add(RenderTriangle.Create(PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(BottomRight, 1, 1), PositionTexture.CreatePos(rightCenter, 1, .5), texture, Level));
RenderTriangleLists[3].Add(RenderTriangle.Create(PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(bottomCenter, .5, 1), PositionTexture.CreatePos(BottomRight, 1, 1), texture, Level));
ReadyToRender = true;
}
else
{
//process vertex list
VertexBuffer = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ARRAY_BUFFER, VertexBuffer);
Float32Array f32array = new Float32Array(9 * 5);
float[] buffer = (float[])(object)f32array;
int index = 0;
index = AddVertex(buffer, index, PositionTexture.CreatePos(bottomCenter, .5, 1)); //0
index = AddVertex(buffer, index, PositionTexture.CreatePos(BottomLeft, 0, 1)); //1
index = AddVertex(buffer, index, PositionTexture.CreatePos(BottomRight, 1, 1)); //2
index = AddVertex(buffer, index, PositionTexture.CreatePos(center, .5, .5)); //3
index = AddVertex(buffer, index, PositionTexture.CreatePos(leftCenter, 0, .5)); //4
index = AddVertex(buffer, index, PositionTexture.CreatePos(rightCenter, 1, .5)); //5
index = AddVertex(buffer, index, PositionTexture.CreatePos(topCenter, .5, 0)); //6
index = AddVertex(buffer, index, PositionTexture.CreatePos(TopLeft, 0, 0)); //7
index = AddVertex(buffer, index, PositionTexture.CreatePos(TopRight, 1, 0)); //8
PrepDevice.bufferData(GL.ARRAY_BUFFER, f32array, GL.STATIC_DRAW);
// process index buffers
for (int i = 0; i < 4; i++)
{
index = 0;
TriangleCount = 2;
Uint16Array ui16array = new Uint16Array(TriangleCount * 3);
UInt16[] indexArray = (UInt16[])(object)ui16array;
switch (i)
{
case 0:
indexArray[index++] = 7;
indexArray[index++] = 4;
indexArray[index++] = 6;
indexArray[index++] = 4;
indexArray[index++] = 3;
indexArray[index++] = 6;
break;
case 1:
indexArray[index++] = 6;
indexArray[index++] = 5;
indexArray[index++] = 8;
indexArray[index++] = 6;
indexArray[index++] = 3;
indexArray[index++] = 5;
break;
case 2:
indexArray[index++] = 4;
indexArray[index++] = 0;
indexArray[index++] = 3;
indexArray[index++] = 4;
indexArray[index++] = 1;
indexArray[index++] = 0;
break;
case 3:
indexArray[index++] = 3;
indexArray[index++] = 2;
indexArray[index++] = 5;
indexArray[index++] = 3;
indexArray[index++] = 0;
indexArray[index++] = 2;
break;
}
IndexBuffers[i] = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, IndexBuffers[i]);
PrepDevice.bufferData(GL.ELEMENT_ARRAY_BUFFER, ui16array, GL.STATIC_DRAW);
}
}
return(true);
}
public override bool CreateGeometry(RenderContext renderContext)
{
base.CreateGeometry(renderContext);
if (renderContext.gl == null)
{
if (dataset.DataSetType == ImageSetType.Earth || dataset.DataSetType == ImageSetType.Planet)
{
subDivisionLevel = Math.Max(2, (4 - Level) * 2);
}
}
else
{
subDivisionLevel = 32;
}
try
{
for (int i = 0; i < 4; i++)
{
RenderTriangleLists[i] = new List <RenderTriangle>();
}
if (!topDown)
{
return(CreateGeometryBottomsUp(renderContext));
}
double lat, lng;
int index = 0;
double tileDegrees = this.dataset.BaseTileDegrees / (Math.Pow(2, this.Level));
double latMin = (90 - (((double)this.tileY) * tileDegrees));
double latMax = (90 - (((double)(this.tileY + 1)) * tileDegrees));
double lngMin = (((double)this.tileX * tileDegrees) - 180.0);
double lngMax = ((((double)(this.tileX + 1)) * tileDegrees) - 180.0);
double tileDegreesX = lngMax - lngMin;
double tileDegreesY = latMax - latMin;
TopLeft = (Vector3d)GeoTo3d(latMin, lngMin, false);
BottomRight = (Vector3d)GeoTo3d(latMax, lngMax, false);
TopRight = (Vector3d)GeoTo3d(latMin, lngMax, false);
BottomLeft = (Vector3d)GeoTo3d(latMax, lngMin, false);
// Create a vertex buffer
PositionTexture[] verts = new PositionTexture[(subDivisionLevel + 1) * (subDivisionLevel + 1)]; // Lock the buffer (which will return our structs)
int x, y;
double textureStep = 1.0f / subDivisionLevel;
for (y = 0; y <= subDivisionLevel; y++)
{
if (y != subDivisionLevel)
{
lat = latMin + (textureStep * tileDegreesY * y);
}
else
{
lat = latMax;
}
for (x = 0; x <= subDivisionLevel; x++)
{
if (x != subDivisionLevel)
{
lng = lngMin + (textureStep * tileDegreesX * x);
}
else
{
lng = lngMax;
}
index = y * (subDivisionLevel + 1) + x;
verts[index] = PositionTexture.CreatePos(GeoTo3d(lat, lng, false), x * textureStep, y * textureStep);
}
}
TriangleCount = (subDivisionLevel) * (subDivisionLevel) * 2;
int quarterDivisions = subDivisionLevel / 2;
int part = 0;
if (renderContext.gl == null)
{
for (int y2 = 0; y2 < 2; y2++)
{
for (int x2 = 0; x2 < 2; x2++)
{
index = 0;
for (int y1 = (quarterDivisions * y2); y1 < (quarterDivisions * (y2 + 1)); y1++)
{
for (int x1 = (quarterDivisions * x2); x1 < (quarterDivisions * (x2 + 1)); x1++)
{
//index = ((y1 * quarterDivisions * 6) + 6 * x1);
// First triangle in quad
PositionTexture p1;
PositionTexture p2;
PositionTexture p3;
p1 = verts[(y1 * (subDivisionLevel + 1) + x1)];
p2 = verts[((y1 + 1) * (subDivisionLevel + 1) + x1)];
p3 = verts[(y1 * (subDivisionLevel + 1) + (x1 + 1))];
RenderTriangleLists[part].Add(RenderTriangle.Create(p1, p3, p2, texture, Level));
// Second triangle in quad
p1 = verts[(y1 * (subDivisionLevel + 1) + (x1 + 1))];
p2 = verts[((y1 + 1) * (subDivisionLevel + 1) + x1)];
p3 = verts[((y1 + 1) * (subDivisionLevel + 1) + (x1 + 1))];
RenderTriangleLists[part].Add(RenderTriangle.Create(p1, p3, p2, texture, Level));
}
}
part++;
}
}
}
else
{
//process vertex list
VertexBuffer = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ARRAY_BUFFER, VertexBuffer);
Float32Array f32array = new Float32Array(verts.Length * 5);
float[] buffer = (float[])(object)f32array;
index = 0;
foreach (PositionTexture pt in verts)
{
index = AddVertex(buffer, index, pt);
}
PrepDevice.bufferData(GL.ARRAY_BUFFER, f32array, GL.STATIC_DRAW);
for (int y2 = 0; y2 < 2; y2++)
{
for (int x2 = 0; x2 < 2; x2++)
{
Uint16Array ui16array = new Uint16Array(TriangleCount * 3);
UInt16[] indexArray = (UInt16[])(object)ui16array;
index = 0;
for (int y1 = (quarterDivisions * y2); y1 < (quarterDivisions * (y2 + 1)); y1++)
{
for (int x1 = (quarterDivisions * x2); x1 < (quarterDivisions * (x2 + 1)); x1++)
{
// First triangle in quad
indexArray[index++] = (UInt16)((y1 * (subDivisionLevel + 1) + x1));
indexArray[index++] = (UInt16)(((y1 + 1) * (subDivisionLevel + 1) + x1));
indexArray[index++] = (UInt16)((y1 * (subDivisionLevel + 1) + (x1 + 1)));
// Second triangle in quad
indexArray[index++] = (UInt16)((y1 * (subDivisionLevel + 1) + (x1 + 1)));
indexArray[index++] = (UInt16)(((y1 + 1) * (subDivisionLevel + 1) + x1));
indexArray[index++] = (UInt16)(((y1 + 1) * (subDivisionLevel + 1) + (x1 + 1)));
}
}
IndexBuffers[part] = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, IndexBuffers[part]);
PrepDevice.bufferData(GL.ELEMENT_ARRAY_BUFFER, ui16array, GL.STATIC_DRAW);
part++;
}
}
}
}
catch
{
}
return(true);
}
public override bool CreateGeometry(RenderContext renderContext)
{
base.CreateGeometry(renderContext);
if (GeometryCreated)
{
return(true);
}
GeometryCreated = true;
for (int i = 0; i < 4; i++)
{
RenderTriangleLists[i] = new List <RenderTriangle>();
}
double tileDegrees = this.dataset.BaseTileDegrees / (Math.Pow(2, this.Level));
double latMin = (((double)this.dataset.BaseTileDegrees / 2.0 - (((double)this.tileY) * tileDegrees)) + this.dataset.OffsetY);
double latMax = (((double)this.dataset.BaseTileDegrees / 2.0 - (((double)(this.tileY + 1)) * tileDegrees)) + this.dataset.OffsetY);
double lngMin = ((((double)this.tileX * tileDegrees) - (double)this.dataset.BaseTileDegrees / dataset.WidthFactor) + this.dataset.OffsetX);
double lngMax = (((((double)(this.tileX + 1)) * tileDegrees) - (double)this.dataset.BaseTileDegrees / dataset.WidthFactor) + this.dataset.OffsetX);
double tileDegreesX = lngMax - lngMin;
double tileDegreesY = latMax - latMin;
TopLeft = GeoTo3dTan(latMin, lngMin);
BottomRight = GeoTo3dTan(latMax, lngMax);
TopRight = GeoTo3dTan(latMin, lngMax);
BottomLeft = GeoTo3dTan(latMax, lngMin);
double latCenter = (latMin + latMax) / 2.0;
double lngCenter = (lngMin + lngMax) / 2.0;
Vector3d center = Vector3d.MidPoint(TopLeft, BottomRight);
Vector3d leftCenter = Vector3d.MidPoint(TopLeft, BottomLeft);
Vector3d rightCenter = Vector3d.MidPoint(TopRight, BottomRight);
Vector3d topCenter = Vector3d.MidPoint(TopLeft, TopRight);
Vector3d bottomCenter = Vector3d.MidPoint(BottomLeft, BottomRight);
if (renderContext.gl == null)
{
RenderTriangleLists[0].Add(RenderTriangle.Create(PositionTexture.CreatePos(TopLeft, 0, 0), PositionTexture.CreatePos(leftCenter, 0, .5), PositionTexture.CreatePos(topCenter, .5, 0), texture, Level));
RenderTriangleLists[0].Add(RenderTriangle.Create(PositionTexture.CreatePos(leftCenter, 0, 0.5), PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(topCenter, .5, 0), texture, Level));
RenderTriangleLists[1].Add(RenderTriangle.Create(PositionTexture.CreatePos(topCenter, .5, 0), PositionTexture.CreatePos(rightCenter, 1, .5), PositionTexture.CreatePos(TopRight, 1, 0), texture, Level));
RenderTriangleLists[1].Add(RenderTriangle.Create(PositionTexture.CreatePos(topCenter, .5, 0), PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(rightCenter, 1, .5), texture, Level));
RenderTriangleLists[2].Add(RenderTriangle.Create(PositionTexture.CreatePos(leftCenter, 0, .5), PositionTexture.CreatePos(bottomCenter, .5, 1), PositionTexture.CreatePos(center, .5, .5), texture, Level));
RenderTriangleLists[2].Add(RenderTriangle.Create(PositionTexture.CreatePos(leftCenter, 0, .5), PositionTexture.CreatePos(BottomLeft, 0, 1), PositionTexture.CreatePos(bottomCenter, .5, 1), texture, Level));
RenderTriangleLists[3].Add(RenderTriangle.Create(PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(BottomRight, 1, 1), PositionTexture.CreatePos(rightCenter, 1, .5), texture, Level));
RenderTriangleLists[3].Add(RenderTriangle.Create(PositionTexture.CreatePos(center, .5, .5), PositionTexture.CreatePos(bottomCenter, .5, 1), PositionTexture.CreatePos(BottomRight, 1, 1), texture, Level));
}
else
{
//process vertex list
VertexBuffer = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ARRAY_BUFFER, VertexBuffer);
Float32Array f32array = new Float32Array(9 * 5);
float[] buffer = (float[])(object)f32array;
int index = 0;
index = AddVertex(buffer, index, PositionTexture.CreatePos(bottomCenter, .5, 1)); //0
index = AddVertex(buffer, index, PositionTexture.CreatePos(BottomLeft, 0, 1)); //1
index = AddVertex(buffer, index, PositionTexture.CreatePos(BottomRight, 1, 1)); //2
index = AddVertex(buffer, index, PositionTexture.CreatePos(center, .5, .5)); //3
index = AddVertex(buffer, index, PositionTexture.CreatePos(leftCenter, 0, .5)); //4
index = AddVertex(buffer, index, PositionTexture.CreatePos(rightCenter, 1, .5)); //5
index = AddVertex(buffer, index, PositionTexture.CreatePos(topCenter, .5, 0)); //6
index = AddVertex(buffer, index, PositionTexture.CreatePos(TopLeft, 0, 0)); //7
index = AddVertex(buffer, index, PositionTexture.CreatePos(TopRight, 1, 0)); //8
PrepDevice.bufferData(GL.ARRAY_BUFFER, f32array, GL.STATIC_DRAW);
// process index buffers
for (int i = 0; i < 4; i++)
{
index = 0;
TriangleCount = 2;
Uint16Array ui16array = new Uint16Array(TriangleCount * 3);
UInt16[] indexArray = (UInt16[])(object)ui16array;
switch (i)
{
case 0:
indexArray[index++] = 7;
indexArray[index++] = 4;
indexArray[index++] = 6;
indexArray[index++] = 4;
indexArray[index++] = 3;
indexArray[index++] = 6;
break;
case 1:
indexArray[index++] = 6;
indexArray[index++] = 5;
indexArray[index++] = 8;
indexArray[index++] = 6;
indexArray[index++] = 3;
indexArray[index++] = 5;
break;
case 2:
indexArray[index++] = 4;
indexArray[index++] = 0;
indexArray[index++] = 3;
indexArray[index++] = 4;
indexArray[index++] = 1;
indexArray[index++] = 0;
break;
case 3:
indexArray[index++] = 3;
indexArray[index++] = 2;
indexArray[index++] = 5;
indexArray[index++] = 3;
indexArray[index++] = 0;
indexArray[index++] = 2;
break;
}
IndexBuffers[i] = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, IndexBuffers[i]);
PrepDevice.bufferData(GL.ELEMENT_ARRAY_BUFFER, ui16array, GL.STATIC_DRAW);
}
}
return(true);
}