init_testtest3d

1 files changed, 316 insertions, 0 deletions

diff --git a/game/addons/zylann.hterrain/native/image_utils_generic.gd b/game/addons/zylann.hterrain/native/image_utils_generic.gd
new file mode 100644
index 0000000..2a8aed8
--- /dev/null
+++ b/game/addons/zylann.hterrain/native/image_utils_generic.gd
@@ -0,0 +1,316 @@
+@tool
+
+# These functions are the same as the ones found in the GDNative library.
+# They are used if the user's platform is not supported.
+
+const HT_Util = preload("../util/util.gd")
+
+var _blur_buffer : Image
+
+
+func get_red_range(im: Image, rect: Rect2) -> Vector2:
+	rect = rect.intersection(Rect2(0, 0, im.get_width(), im.get_height()))
+	var min_x := int(rect.position.x)
+	var min_y := int(rect.position.y)
+	var max_x := min_x + int(rect.size.x)
+	var max_y := min_y + int(rect.size.y)
+
+	var min_height := im.get_pixel(min_x, min_y).r
+	var max_height := min_height
+
+	for y in range(min_y, max_y):
+		for x in range(min_x, max_x):
+			var h = im.get_pixel(x, y).r
+			if h < min_height:
+				min_height = h
+			elif h > max_height:
+				max_height = h
+
+	return Vector2(min_height, max_height)
+
+
+func get_red_sum(im: Image, rect: Rect2) -> float:
+	rect = rect.intersection(Rect2(0, 0, im.get_width(), im.get_height()))
+	var min_x := int(rect.position.x)
+	var min_y := int(rect.position.y)
+	var max_x := min_x + int(rect.size.x)
+	var max_y := min_y + int(rect.size.y)
+
+	var sum := 0.0
+	
+	for y in range(min_y, max_y):
+		for x in range(min_x, max_x):
+			sum += im.get_pixel(x, y).r
+
+	return sum
+
+
+func get_red_sum_weighted(im: Image, brush: Image, pos: Vector2, factor: float) -> float:
+	var min_x = int(pos.x)
+	var min_y = int(pos.y)
+	var max_x = min_x + brush.get_width()
+	var max_y = min_y + brush.get_height()
+	var min_noclamp_x = min_x
+	var min_noclamp_y = min_y
+
+	min_x = clampi(min_x, 0, im.get_width())
+	min_y = clampi(min_y, 0, im.get_height())
+	max_x = clampi(max_x, 0, im.get_width())
+	max_y = clampi(max_y, 0, im.get_height())
+
+	var sum = 0.0
+
+	for y in range(min_y, max_y):
+		var by = y - min_noclamp_y
+
+		for x in range(min_x, max_x):
+			var bx = x - min_noclamp_x
+			
+			var shape_value = brush.get_pixel(bx, by).r
+			sum += im.get_pixel(x, y).r * shape_value * factor
+
+	return sum
+
+
+func add_red_brush(im: Image, brush: Image, pos: Vector2, factor: float):
+	var min_x = int(pos.x)
+	var min_y = int(pos.y)
+	var max_x = min_x + brush.get_width()
+	var max_y = min_y + brush.get_height()
+	var min_noclamp_x = min_x
+	var min_noclamp_y = min_y
+
+	min_x = clampi(min_x, 0, im.get_width())
+	min_y = clampi(min_y, 0, im.get_height())
+	max_x = clampi(max_x, 0, im.get_width())
+	max_y = clampi(max_y, 0, im.get_height())
+
+	for y in range(min_y, max_y):
+		var by = y - min_noclamp_y
+
+		for x in range(min_x, max_x):
+			var bx = x - min_noclamp_x
+
+			var shape_value = brush.get_pixel(bx, by).r
+			var r = im.get_pixel(x, y).r + shape_value * factor
+			im.set_pixel(x, y, Color(r, r, r))
+
+
+func lerp_channel_brush(im: Image, brush: Image, pos: Vector2, 
+	factor: float, target_value: float, channel: int):
+		
+	var min_x = int(pos.x)
+	var min_y = int(pos.y)
+	var max_x = min_x + brush.get_width()
+	var max_y = min_y + brush.get_height()
+	var min_noclamp_x = min_x
+	var min_noclamp_y = min_y
+
+	min_x = clampi(min_x, 0, im.get_width())
+	min_y = clampi(min_y, 0, im.get_height())
+	max_x = clampi(max_x, 0, im.get_width())
+	max_y = clampi(max_y, 0, im.get_height())
+
+	for y in range(min_y, max_y):
+		var by = y - min_noclamp_y
+
+		for x in range(min_x, max_x):
+			var bx = x - min_noclamp_x
+
+			var shape_value = brush.get_pixel(bx, by).r
+			var c = im.get_pixel(x, y)
+			c[channel] = lerp(c[channel], target_value, shape_value * factor)
+			im.set_pixel(x, y, c)
+
+
+func lerp_color_brush(im: Image, brush: Image, pos: Vector2, 
+	factor: float, target_value: Color):
+		
+	var min_x = int(pos.x)
+	var min_y = int(pos.y)
+	var max_x = min_x + brush.get_width()
+	var max_y = min_y + brush.get_height()
+	var min_noclamp_x = min_x
+	var min_noclamp_y = min_y
+
+	min_x = clampi(min_x, 0, im.get_width())
+	min_y = clampi(min_y, 0, im.get_height())
+	max_x = clampi(max_x, 0, im.get_width())
+	max_y = clampi(max_y, 0, im.get_height())
+
+	for y in range(min_y, max_y):
+		var by = y - min_noclamp_y
+
+		for x in range(min_x, max_x):
+			var bx = x - min_noclamp_x
+
+			var shape_value = brush.get_pixel(bx, by).r
+			var c = im.get_pixel(x, y).lerp(target_value, factor * shape_value)
+			im.set_pixel(x, y, c)
+
+
+func generate_gaussian_brush(im: Image) -> float:
+	var sum := 0.0
+	var center := Vector2(im.get_width() / 2, im.get_height() / 2)
+	var radius := minf(im.get_width(), im.get_height()) / 2.0
+
+	for y in im.get_height():
+		for x in im.get_width():
+			var d := Vector2(x, y).distance_to(center) / radius
+			var v := clampf(1.0 - d * d * d, 0.0, 1.0)
+			im.set_pixel(x, y, Color(v, v, v))
+			sum += v;
+
+	return sum
+
+
+func blur_red_brush(im: Image, brush: Image, pos: Vector2, factor: float):
+	factor = clampf(factor, 0.0, 1.0)
+	
+	if _blur_buffer == null:
+		_blur_buffer = Image.new()
+	var buffer := _blur_buffer
+	
+	var buffer_width := brush.get_width() + 2
+	var buffer_height := brush.get_height() + 2
+	
+	if buffer_width != buffer.get_width() or buffer_height != buffer.get_height():
+		buffer.create(buffer_width, buffer_height, false, Image.FORMAT_RF)
+	
+	var min_x := int(pos.x) - 1
+	var min_y := int(pos.y) - 1
+	var max_x := min_x + buffer.get_width()
+	var max_y := min_y + buffer.get_height()
+	
+	var im_clamp_w = im.get_width() - 1
+	var im_clamp_h = im.get_height() - 1
+	
+	# Copy pixels to temporary buffer
+	for y in range(min_y, max_y):
+		for x in range(min_x, max_x):
+			var ix := clampi(x, 0, im_clamp_w)
+			var iy := clampi(y, 0, im_clamp_h)
+			var c = im.get_pixel(ix, iy)
+			buffer.set_pixel(x - min_x, y - min_y, c)
+	
+	min_x = int(pos.x)
+	min_y = int(pos.y)
+	max_x = min_x + brush.get_width()
+	max_y = min_y + brush.get_height()
+	var min_noclamp_x := min_x
+	var min_noclamp_y := min_y
+
+	min_x = clampi(min_x, 0, im.get_width())
+	min_y = clampi(min_y, 0, im.get_height())
+	max_x = clampi(max_x, 0, im.get_width())
+	max_y = clampi(max_y, 0, im.get_height())
+	
+	# Apply blur
+	for y in range(min_y, max_y):
+		var by := y - min_noclamp_y
+
+		for x in range(min_x, max_x):
+			var bx := x - min_noclamp_x
+
+			var shape_value := brush.get_pixel(bx, by).r * factor
+
+			var p10 = buffer.get_pixel(bx + 1, by    ).r
+			var p01 = buffer.get_pixel(bx,     by + 1).r
+			var p11 = buffer.get_pixel(bx + 1, by + 1).r
+			var p21 = buffer.get_pixel(bx + 2, by + 1).r
+			var p12 = buffer.get_pixel(bx + 1, by + 2).r
+			
+			var m = (p10 + p01 + p11 + p21 + p12) * 0.2
+			var p = lerpf(p11, m, shape_value * factor)
+
+			im.set_pixel(x, y, Color(p, p, p))
+
+
+func paint_indexed_splat(index_map: Image, weight_map: Image, brush: Image, pos: Vector2, \
+	texture_index: int, factor: float):
+	
+	var min_x := pos.x
+	var min_y := pos.y
+	var max_x := min_x + brush.get_width()
+	var max_y := min_y + brush.get_height()
+	var min_noclamp_x := min_x
+	var min_noclamp_y := min_y
+
+	min_x = clampi(min_x, 0, index_map.get_width())
+	min_y = clampi(min_y, 0, index_map.get_height())
+	max_x = clampi(max_x, 0, index_map.get_width())
+	max_y = clampi(max_y, 0, index_map.get_height())
+	
+	var texture_index_f := float(texture_index) / 255.0
+	var all_texture_index_f := Color(texture_index_f, texture_index_f, texture_index_f)
+	var ci := texture_index % 3
+	var cm := Color(-1, -1, -1)
+	cm[ci] = 1
+
+	for y in range(min_y, max_y):
+		var by := y - min_noclamp_y
+
+		for x in range(min_x, max_x):
+			var bx := x - min_noclamp_x
+
+			var shape_value := brush.get_pixel(bx, by).r * factor
+			if shape_value == 0.0:
+				continue
+
+			var i := index_map.get_pixel(x, y)
+			var w := weight_map.get_pixel(x, y)
+			
+			# Decompress third weight to make computations easier
+			w[2] = 1.0 - w[0] - w[1]
+			
+			# The index map tells which textures to blend.
+			# The weight map tells their blending amounts.
+			# This brings the limitation that up to 3 textures can blend at a time in a given pixel.
+			# Painting this in real time can be a challenge.
+			
+			# The approach here is a compromise for simplicity.
+			# Each texture is associated a fixed component of the index map (R, G or B),
+			# so two neighbor pixels having the same component won't be guaranteed to blend.
+			# In other words, texture T will not be able to blend with T + N * k,
+			# where k is an integer, and N is the number of components in the index map (up to 4).
+			# It might still be able to blend due to a special case when an area is uniform,
+			# but not otherwise.
+			
+			# Dynamic component assignment sounds like the alternative, however I wasn't able
+			# to find a painting algorithm that wasn't confusing, at least the current one is
+			# predictable.
+			
+			# Need to use approximation because Color is float but GDScript uses doubles...
+			if abs(i[ci] - texture_index_f) > 0.001:
+				# Pixel does not have our texture index,
+				# transfer its weight to other components first
+				if w[ci] > shape_value:
+					w -= cm * shape_value
+					
+				elif w[ci] >= 0.0:
+					w[ci] = 0.0
+					i[ci] = texture_index_f
+					
+			else:
+				# Pixel has our texture index, increase its weight
+				if w[ci] + shape_value < 1.0:
+					w += cm * shape_value
+					
+				else:
+					# Pixel weight is full, we can set all components to the same index.
+					# Need to nullify other weights because they would otherwise never reach
+					# zero due to normalization
+					w = Color(0, 0, 0)
+					w[ci] = 1.0
+					i = all_texture_index_f
+			
+			# No `saturate` function in Color??
+			w[0] = clampf(w[0], 0.0, 1.0)
+			w[1] = clampf(w[1], 0.0, 1.0)
+			w[2] = clampf(w[2], 0.0, 1.0)
+			
+			# Renormalize
+			w /= w[0] + w[1] + w[2]
+			
+			index_map.set_pixel(x, y, i)
+			weight_map.set_pixel(x, y, w)