public void DrawHeightmapFlat(HeightmapView heightmapView, SortedList <int, Color> heightColorGradient)
{
int startX, endX;
HeightmapDrawRangeHelper(heightmapView, out startX, out endX);
if (endX <= startX)
{
return; // Off screen
}
int xFlipFactor = heightmapView.flipX ? -1 : 1;
for (int z = heightmapView.heightmap.EndZ - 1; z >= heightmapView.heightmap.StartZ; z--) // From back to front of heightmap
{
for (int x = startX; x < endX; x++)
{
byte height = heightmapView.heightmap[x * xFlipFactor, z];
if (height == heightmapView.heightmap.DefaultHeight)
{
continue;
}
// Draw top surface
DrawPixel(new Position(heightmapView.position.X + x, 0, heightmapView.position.Z + z),
heightColorGradient.GetColorFromGradient(height + heightmapView.position.Y), 0);
}
}
}
public static AABB AsAABB(this AnimationSet animationSet, Position position, bool facingLeft)
{
// TODO: Stop assuming a height, and get a real AABB from the heightmap (requires Heightmap cache its own AABB)
var heightmapView = new HeightmapView(animationSet.Heightmap, position, facingLeft);
var heightmapXZ = heightmapView.Bounds;
const int guessHeight = 50;
var aabb = new AABB(heightmapXZ.Left, heightmapXZ.Right - 1, position.Y, position.Y + guessHeight, heightmapXZ.Y, heightmapXZ.Y + heightmapXZ.Height - 1);
return(aabb);
}
/// <summary>Constrain rendering to the display bounds</summary>
void HeightmapDrawRangeHelper(HeightmapView heightmapView, out int startX, out int endX)
{
if (heightmapView.flipX)
{
startX = Math.Max(1 - heightmapView.heightmap.EndX, displayBounds.Left - heightmapView.position.X);
endX = Math.Min(1 - heightmapView.heightmap.StartX, displayBounds.Right - heightmapView.position.X);
}
else
{
startX = Math.Max(heightmapView.heightmap.StartX, displayBounds.Left - heightmapView.position.X);
endX = Math.Min(heightmapView.heightmap.EndX, displayBounds.Right - heightmapView.position.X);
}
}
public void DrawHeightmapSolid(HeightmapView heightmapView, SortedList <int, Color> heightColorGradient)
{
int startX, endX;
HeightmapDrawRangeHelper(heightmapView, out startX, out endX);
if (endX <= startX)
{
return; // Off screen
}
int xFlipFactor = heightmapView.flipX ? -1 : 1;
for (int z = heightmapView.heightmap.EndZ - 1; z >= heightmapView.heightmap.StartZ; z--) // From back to front of heightmap
{
for (int x = startX; x < endX; x++)
{
byte height = heightmapView.heightmap[x * xFlipFactor, z];
if (height == heightmapView.heightmap.DefaultHeight)
{
continue;
}
byte nextHeight = heightmapView.heightmap[x * xFlipFactor, z - 1];
if (nextHeight != heightmapView.heightmap.DefaultHeight && nextHeight > height)
{
continue; // Next row will cover this one entirely
}
// Draw top surface
const int zTestOffset = 1; // <- The top surface should be "under" any other pixels
DrawPixel(heightmapView.position + new Position(x, height, z),
heightColorGradient.GetColorFromGradient(height + heightmapView.position.Y), zTestOffset);
if (nextHeight != heightmapView.heightmap.DefaultHeight && nextHeight == height)
{
continue; // Next row covers this one's "solid" section
}
// Draw solidness
for (int h = height + heightmapView.position.Y - 1; h >= heightmapView.position.Y; h--)
{
Color c = Color.Lerp(heightColorGradient.GetColorFromGradient(h), Color.Black, 0.6f);
DrawPixel(new Position(heightmapView.position.X + x, h, heightmapView.position.Z + z), c, 0);
}
}
}
}
