mirror of
https://github.com/godotengine/godot
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2a55f10e8b
- replace OpenSimplexNoise Co-authored-by: Cory Petkovsek <tinmanjuggernaut@users.noreply.github.com>
69 lines
3.8 KiB
C++
69 lines
3.8 KiB
C++
/*************************************************************************/
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/* noise.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "noise.h"
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Ref<Image> Noise::get_seamless_image(int p_width, int p_height, bool p_invert, real_t p_blend_skirt) {
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int skirt_width = p_width * p_blend_skirt;
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int skirt_height = p_height * p_blend_skirt;
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int src_width = p_width + skirt_width;
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int src_height = p_height + skirt_height;
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Ref<Image> src = get_image(src_width, src_height, p_invert);
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bool grayscale = (src->get_format() == Image::FORMAT_L8);
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if (grayscale) {
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return _generate_seamless_image<uint8_t>(src, p_width, p_height, p_invert, p_blend_skirt);
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} else {
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return _generate_seamless_image<uint32_t>(src, p_width, p_height, p_invert, p_blend_skirt);
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}
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}
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// Template specialization for faster grayscale blending.
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template <>
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uint8_t Noise::_alpha_blend<uint8_t>(uint8_t p_bg, uint8_t p_fg, int p_alpha) const {
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uint16_t alpha = p_alpha + 1;
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uint16_t inv_alpha = 256 - p_alpha;
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return (uint8_t)((alpha * p_fg + inv_alpha * p_bg) >> 8);
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}
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void Noise::_bind_methods() {
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// Noise functions.
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ClassDB::bind_method(D_METHOD("get_noise_1d", "x"), &Noise::get_noise_1d);
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ClassDB::bind_method(D_METHOD("get_noise_2d", "x", "y"), &Noise::get_noise_2d);
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ClassDB::bind_method(D_METHOD("get_noise_2dv", "v"), &Noise::get_noise_2dv);
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ClassDB::bind_method(D_METHOD("get_noise_3d", "x", "y", "z"), &Noise::get_noise_3d);
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ClassDB::bind_method(D_METHOD("get_noise_3dv", "v"), &Noise::get_noise_3dv);
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// Textures.
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ClassDB::bind_method(D_METHOD("get_image", "width", "height", "invert"), &Noise::get_image, DEFVAL(false));
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ClassDB::bind_method(D_METHOD("get_seamless_image", "width", "height", "invert", "skirt"), &Noise::get_seamless_image, DEFVAL(false), DEFVAL(0.1));
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}
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