pema99

// SPDX-License-Identifier: MIT
// Author: pema99

// This file contains various functions for projecting irradiance due to contribution from 
// various light types into L2 spherical harmonics.

// Quick reference:
// Functions for projecting irradiance:
//   - SphericalHarmonicsL2 ProjectDirectionalLightIrradianceSHL2(lightDirection, lightColor)
//   - SphericalHarmonicsL2 ProjectPointLightIrradianceSHL2(shadingPosition, lightPosition, lightColor)

pema99

Shader "Unlit/CompareMipSelection"
{
    Properties
    {
        _MainTex ("Main color texture", 2D) = "white" {}
        _MipTexture ("Texture with different color mips", 2D) = "white" {}
        _AnisoLevel ("Aniso Level (must set manually to match texture)", Range(0, 16)) = 0
        [ToggleUI] _VisualizeMipLevels ("Visualize Mip Levels", Integer) = 0
    }
    SubShader

pema99

void EllipsoidTransformDerivatives(inout float2 dx, inout float2 dy)
{
    bool anyZero = length(dx) == 0 || length(dy) == 0;
    bool parallel = (dx.x * dy.y - dx.y * dy.x) == 0;
    bool perpendicular = dot(dx, dy) == 0;
    bool nonFinite = isinf(dx) || isinf(dy) || isnan(dx) || isnan(dy);
    if (!anyZero && !parallel && !perpendicular && !nonFinite)
    {
        float A = dx.y*dx.y + dy.y*dy.y;
        float B = -2.0 * (dx.x * dx.y + dy.x * dy.y);

pema99

public class MakeWeirdMips : MonoBehaviour
{
    [MenuItem("Pema/MakeWeirdMips")]
    public static void MakeWeirdMipsAsset()
    {
        Texture2D tex = new Texture2D(1024, 1024, GraphicsFormat.R32G32B32A32_SFloat, TextureCreationFlags.MipChain);
        FillMip(tex, Color.magenta, 0); // 1024
        FillMip(tex, Color.green, 1); // 512
        FillMip(tex, Color.blue, 2); // 256
        FillMip(tex, Color.red, 3); // 128

pema99

Shader "pema99/SSR"
{
    Properties
    {
        _MaxDistance("Max Distance", Range(0, 100)) = 10
        _Sparsity("Ray Sparsity", Range(0, 1)) = 1.0
        _Thickness("Thickness", Range(0, 1)) = 0.1
        _EdgeFade("Edge Fade", Range(0, 1)) = 0.1
        _Steps("Refinement Steps", Range(1, 20)) = 5
    }

pema99

Shader "pema99/SSR"
{
    Properties
    {
        _MaxDistance("Max Distance", Range(0, 100)) = 100
        _Steps("Steps", Range(1, 1000)) = 1
        _Thickness("Thickness", Range(0, 1)) = 0.1
        _EdgeFade("Edge Fade", Range(0, 1)) = 0.1
    }
    SubShader

pema99

// Paper: ZH3: Quadratic Zonal Harmonics, i3D 2024. https://torust.me/ZH3.pdf
// Code based on paper and demo https://www.shadertoy.com/view/Xfj3RK

#include "UnityCG.cginc"

// L0 radiance = L0 irradiance * PI / Y_0 / AHat_0
// PI / (sqrt(1 / PI) / 2) / PI = 2 * sqrt(PI)
const static float L0IrradianceToRadiance = 2 * sqrt(UNITY_PI);

// L1 radiance = L1 irradiance * PI / Y_1 / AHat_1

pema99

Shader "pema99/SlangMarcher"
{
    Properties
    {
        _Iterations ("Max iterations", Float) = 128
        _MaxDist ("Max distance", Float) = 50
        _MinDist ("Min distance", Float) = 0.001
    }
    SubShader
    {

pema99

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[ExecuteAlways]
public class QuadLightEmitter : MonoBehaviour
{
    [ColorUsage(false, true)]
    public Color color = Color.white;
    public Transform[] verts;

pema99

// SPDX-License-Identifier: MIT
// Author: pema99

// This file contains an implementation of a data structure I've named a BufferMap.
// It works as a map from 'handles' to values, where handles are just integers.
// You insert values into the map, and are returned an automatically generated handle.
// You can then use this handle to retrieve the value, or remove it from the map.
// Handles are never invalidated until they are explicitly removed.
// Amortized time complexities for adding, removing and getting a value from
// the map are all O(1). Additionally, the data structure has the property that