Data/Plugins/ParticlePlugin/Shaders/Particles/DefaultTrailParticle.ezShader - dev - redgpu/ezEngine

Data/Plugins/ParticlePlugin/Shaders/Particles/DefaultTrailParticle.ezShader

85 строк2 KB

Jan Krassnigg

Particle System Improvements (#1995)

21 июл 2026, 16:50

21 июл 2026, 16:505e8aa52

[PLATFORMS]
ALL

[PERMUTATIONS]

RENDER_PASS
PARTICLE_RENDER_MODE
PARTICLE_TRAIL_POINTS
PARTICLE_LIGHTING_MODE
SHADING_QUALITY
CAMERA_MODE

[MATERIALPARAMETER]

// The default particle shader isn't used through a material, so it doesn't define material parameters.

[RENDERSTATE]

#include <Shaders/Particles/ParticleRenderState.h>

[SHADER]

#define CUSTOM_INTERPOLATOR float FogAmount : FOG; float Life : TEXCOORD1; float Variation : TEXCOORD2; float2 ParticleUV : TEXCOORD3;
#define USE_TEXCOORD0
#define USE_COLOR0

[VERTEXSHADER]

#include <Shaders/Particles/TrailParticleVertexShader.h>

[PIXELSHADER]

#include <Shaders/Particles/ParticlePixelShader.h>

// The default shader has to use BG_DRAW_CALL, but custom materials must use BG_MATERIAL.
Texture2D ParticleTexture BIND_GROUP(BG_DRAW_CALL);
SamplerState ParticleTexture_AutoSampler BIND_GROUP(BG_DRAW_CALL);

// Global values use the 'static' keyword so that they can be shared between functions
static float4 g_BaseColor = float4(0.0, 0.0, 0.0, 0.0);

/* === Available input data ===

G.Input looks like this:
struct PS_IN
{
  float4 Position : SV_Position;
  float2 TexCoord0 : TEXCOORD0;
  float4 Color0 : COLOR0;
  float FogAmount : FOG;
  float Life : TEXCOORD1;
  float Variation : TEXCOORD2;
  float2 ParticleUV : TEXCOORD3;
};

Prefer the UV accessors over touching these fields directly:
  GetParticleQuadUV()      - raw [0-1] across the trail, ignores the flipbook / variation atlas
                             .x runs across the trail, .y along it
  GetParticleFlipbookUV()  - the atlas transformed coordinate, i.e. what ParticleTexture uses below

Particle System constants can be accessed through the ezParticleSystemConstants buffer, see
  Data/Plugins/ParticlePlugin/Shaders/Particles/ParticleSystemConstants.h

*/

void FillCustomGlobals()
{
#if PARTICLE_RENDER_MODE == PARTICLE_RENDER_MODE_NONE
  // this code path isn't really necessary, but if someone tries to use the default shader in a material
  // this makes sure it at least shows something visible
  g_BaseColor = float4(G.Input.TexCoord0.xy, 1.0, 1.0);
#else
  g_BaseColor = ParticleTexture.Sample(ParticleTexture_AutoSampler, G.Input.TexCoord0.xy);
#endif
}

float GetParticleOpacity()
{
  return g_BaseColor.a * G.Input.Color0.a;
}

float3 GetParticleColor()
{
  return g_BaseColor.rgb * G.Input.Color0.rgb;
}