Geometry BubbleEmitter::CreateGeometry( unsigned int numOfPatch )
{
unsigned int numVertex = numOfPatch*4u;
std::vector<Vertex> vertexData;
vertexData.reserve( numVertex );
unsigned int numIndex = numOfPatch*6u;
Vector<unsigned int> indexData;
indexData.Reserve( numIndex );
for(unsigned int i = 0; i < numOfPatch; i++)
{
float curSize = RandomRange(mBubbleSizeRange.x, mBubbleSizeRange.y, mRandomSeed);
float index = static_cast<float>( i );
vertexData.push_back( Vertex( index, Vector2(0.f,0.f), Vector2(0.f,0.f) ) );
vertexData.push_back( Vertex( index, Vector2(0.f,curSize), Vector2(0.f,1.f) ) );
vertexData.push_back( Vertex( index, Vector2(curSize,curSize), Vector2(1.f,1.f) ) );
vertexData.push_back( Vertex( index, Vector2(curSize,0.f), Vector2(1.f,0.f) ) );
unsigned int idx = index * 4;
indexData.PushBack( idx );
indexData.PushBack( idx+1 );
indexData.PushBack( idx+2 );
indexData.PushBack( idx );
indexData.PushBack( idx+2 );
indexData.PushBack( idx+3 );
}
Property::Map vertexFormat;
vertexFormat["aIndex"] = Property::FLOAT;
vertexFormat["aPosition"] = Property::VECTOR2;
vertexFormat["aTexCoord"] = Property::VECTOR2;
PropertyBuffer vertices = PropertyBuffer::New( vertexFormat, numVertex );
vertices.SetData( &vertexData[0] );
Property::Map indexFormat;
indexFormat["indices"] = Property::INTEGER;
PropertyBuffer indices = PropertyBuffer::New( indexFormat, numIndex );
indices.SetData( &indexData[0] );
Geometry geometry = Geometry::New();
geometry.AddVertexBuffer( vertices );
geometry.SetIndexBuffer( indices );
return geometry;
}
/**
* @brief Creates a geometry object from vertices and indices.
* @param[in] vertices The object vertices
* @param[in] indices The object indices
* @return A geometry object
*/
Geometry CreateTexturedGeometry( Vector<TexturedVertex>& vertices, Vector<unsigned short>& indices )
{
// Vertices
Property::Map vertexFormat;
vertexFormat[POSITION] = Property::VECTOR3;
vertexFormat[NORMAL] = Property::VECTOR3;
vertexFormat[TEXTURE] = Property::VECTOR2;
PropertyBuffer surfaceVertices = PropertyBuffer::New( vertexFormat );
surfaceVertices.SetData( &vertices[0u], vertices.Size() );
Geometry geometry = Geometry::New();
geometry.AddVertexBuffer( surfaceVertices );
// Indices for triangle formulation
geometry.SetIndexBuffer( &indices[0u], indices.Size() );
return geometry;
}
Geometry CreateQuadGeometry(void)
{
PropertyBuffer vertexData = CreatePropertyBuffer();
const float halfQuadSize = .5f;
struct TexturedQuadVertex { Vector2 position; Vector2 textureCoordinates; };
TexturedQuadVertex texturedQuadVertexData[4] = {
{ Vector2(-halfQuadSize, -halfQuadSize), Vector2(0.f, 0.f) },
{ Vector2( halfQuadSize, -halfQuadSize), Vector2(1.f, 0.f) },
{ Vector2(-halfQuadSize, halfQuadSize), Vector2(0.f, 1.f) },
{ Vector2( halfQuadSize, halfQuadSize), Vector2(1.f, 1.f) } };
vertexData.SetData(texturedQuadVertexData, 4);
unsigned short indexData[6] = { 0, 3, 1, 0, 2, 3 };
Geometry geometry = Geometry::New();
geometry.AddVertexBuffer( vertexData );
geometry.SetIndexBuffer( indexData, sizeof(indexData)/sizeof(indexData[0]) );
return geometry;
}