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feat: shader experiments, for new look. Work in Progress!

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This commit is contained in:
Jakob Feldmann 2024-02-15 14:08:35 +01:00
parent a840405379
commit 5b4248c5bc
8 changed files with 990 additions and 1 deletions
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2
Assets/Models/Materials/FresnelRippleMaterial.mat
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@ -124,7 +124,7 @@ Material:
- _Surface: 0
- _WorkflowMode: 1
- _ZWrite: 1
- _base_alpha: 0.41
- _base_alpha: 0.695
- _impact_amplitude: 0
- _impact_anim: 0
- _impact_blend: 0

8
Assets/Models/Materials/Shaders.meta Normal file
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206
Assets/Models/Materials/Shaders/FesnelRipple.shader Normal file
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@ -0,0 +1,206 @@
Shader "CustomShader/FesnelRipple"
{
Properties
{
_base_alpha ("base alpha", Range(0.0, 1.0)) = 0.5
_shield_color ("shield color", Color) = (0, 0, 1, 1)
_shield_color_brightness ("shield color brightness", Range(0.25, 20)) = 10.0
_shield_intensity ("shield intensity", Range(0.1,20)) = 2.0
_rotation ("rotation", Vector) = (0.1, 0.0, 0.0)
_shield_size ("shield size", Range(0.0,0.5)) = 0.0
_shield_pulse_frequency ("shield pulse frequency", float)= 1.0
_shield_pulse_density ("shield pulse density", float) = 1.0
_shield_pulse_amplitude ("shield pulse amplitude", float) = 1.0
_shield_pulse_blend ("shield pulse blend", float) = 1.0
_shield_pulse_radius ("shield pulse radius", float) = 1.0
_impact_origin ("impact origin", Vector) = (1.0, 0.0, 0.0)
_impact_frequency ("impact frequency", float) = 5.0
_impact_density ("impact density", float) = 5.0
_impact_amplitude ("impact amplitude", float) = 6.0
_impact_blend ("impact blend", float) = 0
_impact_radius ("impact radius", float) = 1.1
_impact_anim ("impact anim", Range(0.0,0.1)) = 0.0
}
HLSLINCLUDE
#pragma vertex vert
#pragma fragment frag
#pragma enable_d3d11_debug_symbols
#include "UnityCG.cginc"
// properties
float _base_alpha;
float4 _shield_color;
float _shield_color_brightness;
float _shield_intensity;
float3 _rotation;
float _shield_size;
float _shield_pulse_frequency;
float _shield_pulse_density;
float _shield_pulse_amplitude;
float _shield_pulse_blend;
float _shield_pulse_radius;
float3 _impact_origin;
float _impact_frequency;
float _impact_amplitude;
float _impact_blend;
float _impact_density;
float _impact_radius;
float _impact_anim;
// Impact functions
float _FadeRipple(float dist, float blend, float radius) {
// create a radius
return smoothstep(radius, 0, dist);
}
float _ComputeRipple(float3 vert, float3 orig, float blend, float radius, float freq, float dens, float ampl, float anim) {
// calculate the intensity of the impact
float dist = distance(vert, orig);
float i = sin((freq * anim - dist * dens)) * ampl;
return i * _FadeRipple(dist, blend, radius);
}
// Shield functions
float ComputeFresnel(float3 norm, float3 view_dir, float intensity) {
float width = 0.95;
float softness = 0.96;
float fresnel = 1.0 - saturate(dot(norm, view_dir));
fresnel = pow(fresnel, intensity);
fresnel = lerp(1, smoothstep(width, softness, fresnel), step(0, width));
return fresnel;
}
float4 Rotate(float3 vert, float3 speed) {
// build the 3 rotation matrices
speed = speed * _Time * 5.0;
float4x4 xrot = float4x4(
float4(1.0, 0.0, 0.0, 0.0),
float4(0.0, cos(speed.x), -sin(speed.x), 0.0),
float4(0.0, sin(speed.x), cos(speed.x), 0.0),
float4(0.0, 0.0, 0.0, 1.0));
float4x4 yrot = float4x4(
float4(cos(speed.y), 0.0, -sin(speed.y), 0.0),
float4(0.0, 1.0, 0.0, 0.0),
float4(sin(speed.y), 0.0, cos(speed.y), 0.0),
float4(0.0, 0.0, 0.0, 1.0));
float4x4 zrot = float4x4(
float4(cos(speed.z), -sin(speed.z), 0.0, 0.0),
float4(sin(speed.z), cos(speed.z), 0.0, 0.0),
float4(0.0, 0.0, 1.0, 0.0),
float4(0.0, 0.0, 0.0, 1.0));
float4 output = mul(xrot, mul(yrot, mul(zrot, float4(vert.xyz, 1.0))));
return output;
}
// vertex shader inputs
struct appdata
{
float4 vertex : POSITION;
float4 normal : NORMAL;
float2 uv : TEXCOORD0;
};
// vertex shader outputs to fragment
struct v2f
{
float2 uv : TEXCOORD0; // texture coordinate
float4 vertex : SV_POSITION; // clips space position
float3 normal : NORMAL;
float3 viewDirection : TEXCOORD2;
};
// vertex shader
v2f vert (appdata v)
{
v.vertex = Rotate(v.vertex, _rotation);
v.normal = Rotate(v.normal, _rotation);
float4 vert_world_pos = mul(unity_ObjectToWorld, v.vertex);
float impact_ripple = _ComputeRipple(v.vertex.xyz,
_impact_origin.xyz,
_impact_blend,
_impact_radius,
_impact_frequency,
_impact_density,
_impact_amplitude,
_impact_anim);
v.vertex += v.normal * (impact_ripple + _shield_size);
v2f o;
// transform position to clip space
// (multiply with model*view*projection matrix)
o.vertex = UnityObjectToClipPos(v.vertex);
// just pass the texture coordinate
o.uv = v.uv;
o.normal = v.normal.xyz;
o.viewDirection = normalize(WorldSpaceViewDir(vert_world_pos));
return o;
}
ENDHLSL
SubShader
{
Tags { "RenderType"="Transparent"
"RenderPipeline" = "UniversalPipeline"
"Queue"="Transparent"
"ForceNoShadowCasting"="True"
// "IgnoreProjector"="True"
// "Zwrite"="Off"
}
Blend SrcAlpha OneMinusSrcAlpha
Pass
{
Tags
{
"LightMode" = "UniversalForward"
"RenderType"="Opaque"
"Queue"="Transparent"
}
Name "BackCullingPass"
Cull Back
HLSLPROGRAM
half4 frag (v2f i) : SV_Target
{
float f = ComputeFresnel(i.normal, i.viewDirection, _shield_intensity);
half4 col = 0;
half3 normalToGray = (0.299 * i.normal.r) + (0.587 * i.normal.g) + (0.114 * i.normal.b);
col.rgb = f * _shield_color_brightness * _shield_color + (abs(normalToGray) - 0.3);
col.a = f * _base_alpha;
return col;
}
ENDHLSL
}
Pass
{
Tags
{
"LightMode" = "SRPDefaultUnLit"
"RenderType"="Transparent"
"Queue"="Transparent"
}
Name "FrontCullingPass"
Cull Front
HLSLPROGRAM
half4 frag (v2f i) : SV_Target
{
//float f = ComputeFresnel(i.normal, i.viewDirection, _shield_intensity);
half4 col = 0;
half3 normalToGray = (0.299 * i.normal.r) + (0.587 * i.normal.g) + (0.114 * i.normal.b);
col.rgb = _shield_color_brightness * _shield_color + (abs(normalToGray) * 0.5 - 0.5);
col.a = _base_alpha * 0.5;
return col;
}
ENDHLSL
}
}
}

10
Assets/Models/Materials/Shaders/FesnelRipple.shader.meta Normal file
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102
Assets/Scripts/MeshWireframeComputor.cs Normal file
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[RequireComponent(typeof(MeshFilter))]
public class MeshWireframeComputor : MonoBehaviour
{
private static Color[] _COLORS = new Color[]
{
Color.red,
Color.green,
Color.blue,
};
#if UNITY_EDITOR
private void OnValidate()
{
// (called whenever the object is updated)
UpdateMesh();
}
#endif
[ContextMenu("Update Mesh")]
public void UpdateMesh()
{
if (!gameObject.activeSelf || !GetComponent<MeshRenderer>().enabled)
return;
Mesh m = GetComponent<MeshFilter>().sharedMesh;
if (m == null) return;
// compute and store vertex colors for the
// wireframe shader
Color[] colors = _SortedColoring(m);
if (colors != null)
m.SetColors(colors);
}
private Color[] _SortedColoring(Mesh mesh)
{
int n = mesh.vertexCount;
int[] labels = new int[n];
List<int[]> triangles = _GetSortedTriangles(mesh.triangles);
triangles.Sort((int[] t1, int[] t2) =>
{
int i = 0;
while (i < t1.Length && i < t2.Length)
{
if (t1[i] < t2[i]) return -1;
if (t1[i] > t2[i]) return 1;
i += 1;
}
if (t1.Length < t2.Length) return -1;
if (t1.Length > t2.Length) return 1;
return 0;
});
foreach (int[] triangle in triangles)
{
List<int> availableLabels = new List<int>() { 1, 2, 3 };
foreach (int vertexIndex in triangle)
{
if (availableLabels.Contains(labels[vertexIndex]))
availableLabels.Remove(labels[vertexIndex]);
}
foreach (int vertexIndex in triangle)
{
if (labels[vertexIndex] == 0)
{
if (availableLabels.Count == 0)
{
Debug.LogError("Could not find color");
return null;
}
labels[vertexIndex] = availableLabels[0];
availableLabels.RemoveAt(0);
}
}
}
Color[] colors = new Color[n];
for (int i = 0; i < n; i++)
colors[i] = labels[i] > 0 ? _COLORS[labels[i] - 1] : _COLORS[0];
return colors;
}
private List<int[]> _GetSortedTriangles(int[] triangles)
{
List<int[]> result = new List<int[]>();
for (int i = 0; i < triangles.Length; i += 3)
{
List<int> t = new List<int> { triangles[i], triangles[i + 1], triangles[i + 2] };
t.Sort();
result.Add(t.ToArray());
}
return result;
}
}

11
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