Maxwell Render always needs real geometry to emit lights. Spotlights and other abstractions that are not physically correct are not natively supported. However it is possible converting lights such cone lights, spot lights, etc from the host platform into real geometries with emission materials applied. The SDK provides some convenience functions to translate lights easily. For instances:
byte CreateHemisphereLight ( Cmaxwell* pScene, char* name, Cbase& base, Cmaxwell::Cmaterial& emitMat, real sceneScale,
real sizeX, real sizeY, real sizeZ, dword hemisphereSegments,
bool hideToCamera, bool hideToRays, Cmaxwell::Cobject& hemisphere )
{
byte isOk = 1;
real radiusX = sizeX *sceneScale * 0.5;
real radiusY = sizeY *sceneScale * 0.5;
real radiusZ = sizeZ *sceneScale * 0.5;
dword nVertices = 2 + ( hemisphereSegments - 2 ) * hemisphereSegments;
dword nTriangulos = 2 * hemisphereSegments + ( hemisphereSegments - 3 ) * 2 * hemisphereSegments;
dword nNormales = 0;
hemisphere = pScene->createMesh ( name, nVertices, nNormales, nTriangulos, 1 );
Cpoint pos;
pos.assign ( 0.0 , radiusY, 0.0 );//Polo norte
isOk = hemisphere.setVertex ( 0, 0, pos );
pos.assign ( 0.0, 0.0, 0.0 );//Polo sur
isOk = hemisphere.setVertex ( nVertices - 1, 0, pos );
dword latSegments = hemisphereSegments - 1;
real deltaLat = pi / ( ( real ) 2.0*latSegments );
//Vertices
dword iVertex = 1;
for ( dword i = 0; i < latSegments - 1; i++ )
{
real lat0 = pi/2 - deltaLat - ( deltaLat * i );
for ( dword j = 0; j < hemisphereSegments; j++ )
{
real lon0 = (2 * pi /(real)hemisphereSegments)* j;
real x0 = radiusX*cosf( lat0 ) * cosf( lon0 );
real y0 = radiusY*sinf( lat0 );
real z0 = radiusZ*cosf( lat0 ) * sinf( lon0 );
pos.assign ( x0, y0, z0 );
isOk = hemisphere.setVertex ( iVertex, 0, pos );
iVertex++;
}
}
//Faces
//hemisphere above
for ( dword i = 0; i < hemisphereSegments; i++ )
{
dword i2 = i+2;
if ( i == hemisphereSegments - 1 ) i2 = 1;
isOk = hemisphere.setTriangle ( i, 0, i+1, i2, 0, 0, 0 );
}
dword coronas = latSegments - 2;
dword iFace = hemisphereSegments;
for ( dword i = 0; i < coronas; i++ )
{
for ( dword j = 0; j < hemisphereSegments; j++ )
{
dword vOff = 1 + i*hemisphereSegments;
dword i1 = vOff + j;
dword i2 = vOff + hemisphereSegments + j;
dword i3 = vOff + hemisphereSegments + j + 1;
if ( j == hemisphereSegments - 1 ) i3 = vOff + hemisphereSegments;
dword i4 = vOff + j + 1;
if ( j == hemisphereSegments - 1 ) i4 = vOff;
isOk = hemisphere.setTriangle ( iFace, i1, i2, i4, 0, 0, 0 );
iFace++;
isOk = hemisphere.setTriangle ( iFace, i2, i3, i4, 0, 0, 0 );
iFace++;
}
}
//Disk below
dword vO = 1+hemisphereSegments*(hemisphereSegments-3);
for ( dword i = 0; i < hemisphereSegments; i++ )
{
dword i2 = i + vO + 1;
if ( i == hemisphereSegments - 1 ) i2 = vO;
isOk = hemisphere.setTriangle ( iFace, i + vO, nVertices-1, i2, 0, 0, 0 );
iFace++;
}
isOk = hemisphere.setBase ( base );
Cbase pivot;
pivot.initCanonic ();
isOk = hemisphere.setPivot( pivot );
isOk = hemisphere.setHideToCamera( hideToCamera );
isOk = hemisphere.setHideToReflectionsRefractions( hideToRays );
isOk = hemisphere.setMaterial( emitMat );
return isOk;
}