void TreeLoader2D::loadPage(PageInfo &page)
{
//Calculate x/z indexes for the grid array
page.xIndex -= Math::Floor(gridBounds.left / pageSize);
page.zIndex -= Math::Floor(gridBounds.top / pageSize);
//Check if the requested page is in bounds
if (page.xIndex < 0 || page.zIndex < 0 || page.xIndex >= pageGridX || page.zIndex >= pageGridZ)
return;
//For each tree type...
PageGridListIterator i;
for (i = pageGridList.begin(); i != pageGridList.end(); ++i) {
//Get the appropriate tree list for the specified page
std::vector<TreeDef> *pageGrid = i->second;
std::vector<TreeDef> &treeList = _getGridPage(pageGrid, page.xIndex, page.zIndex);
Entity *entity = i->first;
//Load the listed trees into the page
std::vector<TreeDef>::iterator o;
for (o = treeList.begin(); o != treeList.end(); ++o) {
//Get position
Vector3 pos;
pos.x = page.bounds.left + ((Real)o->xPos / 65535) * pageSize;
pos.z = page.bounds.top + ((Real)o->zPos / 65535) * pageSize;
//Calculate terrain height at pos.x / pos.z to get pos.y
if (heightFunction != NULL)
pos.y = heightFunction(pos.x, pos.z, heightFunctionUserData);
else
pos.y = 0.0f;
//Get rotation
Degree angle((Real)o->rotation * (360.0f / 255));
Quaternion rot(angle, Vector3::UNIT_Y);
//Get scale
Vector3 scale;
scale.y = (Real)o->scale * (maximumScale / 255) + minimumScale;
scale.x = scale.y;
scale.z = scale.y;
//Get color
ColourValue color;
if (colorMap)
color = colorMap->getColorAt_Unpacked(pos.x, pos.z, actualBounds);
else
color = ColourValue::White;
addEntity(entity, pos, rot, scale, color);
}
}
}
Mesh *GrassLoader::generateGrass_SPRITE(PageInfo &page, GrassLayer *layer, float *grassPositions, unsigned int grassCount)
{
//Calculate the number of quads to be added
unsigned int quadCount;
quadCount = grassCount;
// check for overflows of the uint16's
unsigned int maxUInt16 = std::numeric_limits<uint16>::max();
if(grassCount > maxUInt16)
{
LogManager::getSingleton().logMessage("grass count overflow: you tried to use more than " + StringConverter::toString(maxUInt16) + " (thats the maximum) grass meshes for one page");
return 0;
}
if(quadCount > maxUInt16)
{
LogManager::getSingleton().logMessage("quad count overflow: you tried to use more than " + StringConverter::toString(maxUInt16) + " (thats the maximum) grass meshes for one page");
return 0;
}
//Create manual mesh to store grass quads
MeshPtr mesh = MeshManager::getSingleton().createManual(getUniqueID(), ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
SubMesh *subMesh = mesh->createSubMesh();
subMesh->useSharedVertices = false;
//Setup vertex format information
subMesh->vertexData = new VertexData;
subMesh->vertexData->vertexStart = 0;
subMesh->vertexData->vertexCount = 4 * quadCount;
VertexDeclaration* dcl = subMesh->vertexData->vertexDeclaration;
size_t offset = 0;
dcl->addElement(0, offset, VET_FLOAT3, VES_POSITION);
offset += VertexElement::getTypeSize(VET_FLOAT3);
dcl->addElement(0, offset, VET_FLOAT4, VES_NORMAL);
offset += VertexElement::getTypeSize(VET_FLOAT4);
dcl->addElement(0, offset, VET_COLOUR, VES_DIFFUSE);
offset += VertexElement::getTypeSize(VET_COLOUR);
dcl->addElement(0, offset, VET_FLOAT2, VES_TEXTURE_COORDINATES);
offset += VertexElement::getTypeSize(VET_FLOAT2);
//Populate a new vertex buffer with grass
HardwareVertexBufferSharedPtr vbuf = HardwareBufferManager::getSingleton()
.createVertexBuffer(offset, subMesh->vertexData->vertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);
float* pReal = static_cast<float*>(vbuf->lock(HardwareBuffer::HBL_DISCARD));
//Calculate size variance
float rndWidth = layer->maxWidth - layer->minWidth;
float rndHeight = layer->maxHeight - layer->minHeight;
float minY = Math::POS_INFINITY, maxY = Math::NEG_INFINITY;
float *posPtr = grassPositions; //Position array "iterator"
for (uint16 i = 0; i < grassCount; ++i)
{
//Get the x and z positions from the position array
float x = *posPtr++;
float z = *posPtr++;
//Calculate height
float y;
if (heightFunction){
y = heightFunction(x, z, heightFunctionUserData);
} else {
y = 0;
}
float x1 = (x - page.centerPoint.x);
float z1 = (z - page.centerPoint.z);
//Get the color at the grass position
uint32 color;
if (layer->colorMap)
color = layer->colorMap->getColorAt(x, z, layer->mapBounds);
else
color = 0xFFFFFFFF;
//Calculate size
float rnd = *posPtr++; //The same rnd value is used for width and height to maintain aspect ratio
float halfXScale = (layer->minWidth + rndWidth * rnd) * 0.5f;
float scaleY = (layer->minHeight + rndHeight * rnd);
//Randomly mirror grass textures
float uvLeft, uvRight;
if (*posPtr++ > 0.5f){
uvLeft = 0;
uvRight = 1;
} else {
uvLeft = 1;
uvRight = 0;
}
//Add vertices
*pReal++ = x1; *pReal++ = y; *pReal++ = z1; //center position
*pReal++ = -halfXScale; *pReal++ = scaleY; *pReal++ = 0; *pReal++ = 0; //normal (used to store relative corner positions)
*((uint32*)pReal++) = color; //color
*pReal++ = uvLeft; *pReal++ = 0; //uv
*pReal++ = x1; *pReal++ = y; *pReal++ = z1; //center position
*pReal++ = +halfXScale; *pReal++ = scaleY; *pReal++ = 0; *pReal++ = 0; //normal (used to store relative corner positions)
*((uint32*)pReal++) = color; //color
*pReal++ = uvRight; *pReal++ = 0; //uv
*pReal++ = x1; *pReal++ = y; *pReal++ = z1; //center position
*pReal++ = -halfXScale; *pReal++ = 0.0f; *pReal++ = 0; *pReal++ = 0; //normal (used to store relative corner positions)
*((uint32*)pReal++) = color; //color
*pReal++ = uvLeft; *pReal++ = 1; //uv
*pReal++ = x1; *pReal++ = y; *pReal++ = z1; //center position
*pReal++ = +halfXScale; *pReal++ = 0.0f; *pReal++ = 0; *pReal++ = 0; //normal (used to store relative corner positions)
*((uint32*)pReal++) = color; //color
*pReal++ = uvRight; *pReal++ = 1; //uv
//Update bounds
if (y < minY) minY = y;
if (y + scaleY > maxY) maxY = y + scaleY;
}
vbuf->unlock();
subMesh->vertexData->vertexBufferBinding->setBinding(0, vbuf);
//Populate index buffer
subMesh->indexData->indexStart = 0;
subMesh->indexData->indexCount = 6 * quadCount;
subMesh->indexData->indexBuffer = HardwareBufferManager::getSingleton()
.createIndexBuffer(HardwareIndexBuffer::IT_16BIT, subMesh->indexData->indexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
uint16* pI = static_cast<uint16*>(subMesh->indexData->indexBuffer->lock(HardwareBuffer::HBL_DISCARD));
for (uint16 i = 0; i < quadCount; ++i)
{
uint16 offset = i * 4;
*pI++ = 0 + offset;
*pI++ = 2 + offset;
*pI++ = 1 + offset;
*pI++ = 1 + offset;
*pI++ = 2 + offset;
*pI++ = 3 + offset;
}
subMesh->indexData->indexBuffer->unlock();
//subMesh->setBuildEdgesEnabled(autoEdgeBuildEnabled);
//Finish up mesh
AxisAlignedBox bounds(page.bounds.left - page.centerPoint.x, minY, page.bounds.top - page.centerPoint.z,
page.bounds.right - page.centerPoint.x, maxY, page.bounds.bottom - page.centerPoint.z);
mesh->_setBounds(bounds);
Vector3 temp = bounds.getMaximum() - bounds.getMinimum();
mesh->_setBoundingSphereRadius(temp.length() * 0.5f);
LogManager::getSingleton().setLogDetail(static_cast<LoggingLevel>(0));
mesh->setAutoBuildEdgeLists(autoEdgeBuildEnabled);
mesh->load();
LogManager::getSingleton().setLogDetail(LL_NORMAL);
//Apply grass material to mesh
subMesh->setMaterialName(layer->material->getName());
//Return the mesh
return mesh.getPointer();
}