// Constructor for the landscape class.
BoidsLand::BoidsLand( )
{
// Initialise the COM interface pointers.
landFrame = NULL;
solidStyle = DEFAULT_LANDSCAPE_SOLID_STYLE;
solidColour = LSC_GREEN;
wireframeOn = true; // Initialize the flags.
solidOn = false;
exists = false; // This will be set by the build function.
// Call the member function to produce the landscape altitudes.
calcHeights( );
}
static void makeNormalMap(sU16* dst, const sU16* src, sInt w, sInt h, sF32 hScale)
{
sInt x, y;
sF32 nx, ny, nz;
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
dst[3] = calcHeights(src, x, y, w, h, 1, 1, nx, ny) * 32767.0f;
nx = -nx * hScale;
ny = -ny * hScale;
nz = 16383.0f / sqrt(nx * nx + ny * ny + 1.0f);
dst[0] = nz + 16384;
dst[1] = ny * nz + 16384;
dst[2] = nx * nz + 16384;
dst += 4;
}
}
}
// Destroy, recalculate and redraw the landscape.
void BoidsLand::recalculate( )
{
// Deconstruct the landscape.
if ( landFrame )
{
deconstruct( );
}
// Call the member function to produce the landscape altitudes.
calcHeights( );
// If the lanscape is not present, bring it back as a wireframe -
// - to show the recalculation.
if ( solidOn == false && wireframeOn == false )
{
wireframeOn = true;
}
// Re-build the landscape.
build( window, d3drm, scene, solidStyle );
}
