heretique’s gists

heretique / rgb_blend.c

Created March 27, 2025 20:02 — forked from mattiasgustavsson/rgb_blend.c


	// color1 and color2 are R4G4B4 12bit RGB color values, alpha is 0-255
	uint16_t blend_12bit( uint16_t color1, uint16_t color2, uint8_t alpha ) {
	uint64_t c1 = (uint64_t) color1;
	uint64_t c2 = (uint64_t) color2;
	uint64_t a = (uint64_t)( alpha >> 4 );
	// bit magic to alpha blend R G B with single mul
	c1 = ( c1 \| ( c1 << 12 ) ) & 0x0f0f0f;
	c2 = ( c2 \| ( c2 << 12 ) ) & 0x0f0f0f;
	uint32_t o = ( ( ( ( c2 - c1 ) * a ) >> 4 ) + c1 ) & 0x0f0f0f;

heretique / GpuPrinter.cginc

Created August 11, 2024 20:16 — forked from FreyaHolmer/GpuPrinter.cginc

A unity shader .cginc to draw numbers in the fragment shader - see the first comment below for example usage!

	///////////////////////////////////////////////////////////////////////////////
	// ABOUT: A unity Shader .cginc to draw numbers in the fragment shader
	// AUTHOR: Freya Holmér
	// LICENSE: Use for whatever, commercial or otherwise!
	// Don't hold me liable for issues though
	// But pls credit me if it works super well <3
	// LIMITATIONS: There's some precision loss beyond 3 decimal places
	// CONTRIBUTORS: yes please! if you know a more precise way to get
	// decimal digits then pls lemme know!
	// GetDecimalSymbolAt() could use some more love/precision

heretique / WorldNormalFromDepthTexture.shader

Created October 12, 2023 07:11 — forked from bgolus/WorldNormalFromDepthTexture.shader

Different methods for getting World Normal from Depth Texture, without any external script dependencies.

	Shader "WorldNormalFromDepthTexture"
	{
	Properties {
	[KeywordEnum(3 Tap, 4 Tap, Improved, Accurate)] _ReconstructionMethod ("Normal Reconstruction Method", Float) = 0
	}

	SubShader
	{
	Tags { "RenderType"="Transparent" "Queue"="Transparent" }
	LOD 100

heretique / HatchBlend6_DistanceAndFOVCorrected.shader

Created October 12, 2023 07:10 — forked from bgolus/HatchBlend6_DistanceAndFOVCorrected.shader

A modification of Kyle Halladay's Pencil Sketch Effect shader from his blog post here: http://kylehalladay.com/blog/tutorial/2017/02/21/Pencil-Sketch-Effect.html

	// A modification of Kyle Halladay's Pencil Sketch Effect shader
	// http://kylehalladay.com/blog/tutorial/2017/02/21/Pencil-Sketch-Effect.html

	// Blends between two scales of hatching based on distance and camera fov to
	// keep a perceptually constant hatching scale (assuming consistent mesh UVs).

	Shader "Unlit/SingleObjectHatch_DistanceAndFOVCorrected"
	{
	Properties
	{

heretique / MobileVRHighlight.shader

Created October 12, 2023 07:04 — forked from bgolus/MobileVRHighlight.shader

A mobile VR and MSAA friendly single object highlight shader using the stencil buffer

	Shader "Mobile VR Highlight" {
	Properties {
	_ColorOutline ("Outline", Color) = (1,1,1,1)
	_ColorInterior ("Interior", Color) = (0.25,0.25,0.25,0.25)
	_ColorInteriorFaded ("Interior Faded", Color) = (0.1,0.1,0.1,0.1)
	_ColorInteriorOcc ("Interior Occluded", Color) = (0.15,0.15,0.15,0.15)
	_ColorInteriorOccFaded ("Interior Occluded Faded", Color) = (0.05,0.05,0.05,0.05)
	_PulseRateMod ("Pulse Rate Modifier", Float) = 4.0
	_OutlneWidth ("Outline Pixel Width", Float) = 1.0
	}

heretique / InfiniteGrid.shader

Created October 12, 2023 07:03 — forked from bgolus/InfiniteGrid.shader

Infinite Grid shader with procedural grid with configurable divisions and major and minor lines markings.

	Shader "Unlit/InfiniteGrid"
	{
	Properties
	{
	[Toggle] _WorldUV ("Use World Space UV", Float) = 1.0
	_GridScale ("Grid Scale", Float) = 1.0
	_GridBias ("Grid Bias", Float) = 0.5
	_GridDiv ("Grid Divisions", Float) = 10.0
	_BaseColor ("Base Color", Color) = (0,0,0,1)
	_LineColor ("Line Color", Color) = (1,1,1,1)

heretique / MatCapTechniques.shader

Created October 12, 2023 07:03 — forked from bgolus/MatCapTechniques.shader

Showing multiple matcap techniques, including a proposed improved method that's no more expensive than the usual fix if you're starting with the world position and world normal.

	Shader "Unlit/MatCap Techniques"
	{
	Properties
	{
	[NoScaleOffset] _MatCap ("MatCap", 2D) = "white" {}
	[KeywordEnum(ViewSpaceNormal, ViewDirectionCross, ViewDirectionAligned)] _MatCapType ("Matcap UV Type", Float) = 2
	}
	SubShader
	{
	Tags { "RenderType"="Opaque" }

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