11/14/2022 0 Comments Godot palette swap![]() Then you need to create a mask to use that palette, where each palette index is a red value in the mask, and a 255 color means ignore that pixel. Pow 2 means, the palette width should be 2 ^ x, example values: 1, 2, 4, 8, 16, 32, 64, 128.īut 3 isn't pow two so the palette width should be expanded to the next compatible value which is 4 and filled with anything. The shader read only the first row of the palette. Usageįirst you need to create a pow 2 palette texture. #GODOT PALETTE SWAP CODE#RequirementsĪnd use it as a material in your sprites. extract color palette from PNG images when loading from disk save PNG with a palette associated with it to modified within Godot, also supporting saving. 766 Color Palette Swap Shader RGB 8-bit shader which can swap 766 colors per shader instance.Includes two demos scenes with explanations, and a code template to dynamically change the colors with a GDScript. At least one pixel needs to be completely transparent, assuming you need your sprite to have a transparent bg. Note: ColorMine uses the sRgb color space. Select a color space and enter your values for accurately convert your selection to Rgb, Cmy, Cmyk, Hsl, Xyz, Lab, Lch and Yxy. #GODOT PALETTE SWAP FREE#If an inconsistency appears between Intel/Amd/Nvidia GPU, Feel free to fix and commit it, but take this as a warning for production use. First, the palette should be a texture 1 pixel tall, and as many pixels wide as colors you need. Edit the color in the color picker, and then click the override button above the picker. This is for the source sprite, NOT the version with the palette applied to it.Replaces a Sprite color with another one using a mask. This means that on your source sprite, the background color needs to be transparent. The outline is determined by sampling the alpha values of the pixels surrounding each pixel, which is then passed through some functions that make the outline pixels the desired color, and set their alpha to 1. (Also, disable 'alpha border fix' when importing your sprites) #GODOT PALETTE SWAP MANUAL#This can take some manual tweaking, but it works fine for me with 16 colors. So, the leftmost palette color would have a red value of 0, the rightmost a red value of 1, and values in the middle would be at other arbitrary red values. Your actual sprite should have a palette consisting of shades of red, with each red value corresponding to a UV position on the palette texture. Using found alpha value, determine the opacity of the outlineĬol.rgb = mix(outline_col.xyz, col.rgb, col.a) įirst, the palette should be a texture 1 pixel tall, and as many pixels wide as colors you need. Vec4 col = texture(palette_tex,vec2(pal_sample,0)) įloat a = texture(TEXTURE,UV+vec2(p.x,0)).a Get red value and sample palette based on itįloat pal_sample = texture(TEXTURE,UV).r Top row of palette are color references these colors are sampled from the original image and. You can pick a GPL palette file from your filesystem. A shader that changes sprite colors based on provided palette. Uniform vec4 outline_col : hint_color //Outline color After installing and enabling it you will find new Project Settings under 'FC > ColorPicker Palette': ' Colors ' and 'GPL File'. Uniform sampler2D palette_tex //Palette to reference, this should be a 1-pixel tall texture containing your palette info I figured other people could find this useful, so here's the source code and a brief explanation shader_type canvas_item This is a shader I wrote for my platform fighting game, which lets me outline sprites and apply a palette to them. ![]()
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