t2-mapper/docs/_next/static/chunks/4e5626f3eeee0985.js

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#include <fog_pars_vertex>

varying vec2 vUv;

void main() {
  vUv = uv;
  vec4 mvPosition = modelViewMatrix * vec4(position, 1.0);
  gl_Position = projectionMatrix * mvPosition;
  #include <fog_vertex>
}
`,m=`
#include <fog_pars_fragment>

uniform sampler2D frame0;
uniform sampler2D frame1;
uniform sampler2D frame2;
uniform sampler2D frame3;
uniform sampler2D frame4;
uniform int currentFrame;
uniform float vScroll;
uniform vec2 uvScale;
uniform vec3 tintColor;
uniform float opacity;
uniform float opacityFactor;

varying vec2 vUv;

void main() {
  // Scale and scroll UVs
  vec2 scrolledUv = vec2(vUv.x * uvScale.x, vUv.y * uvScale.y + vScroll);

  // Sample the current frame
  vec4 texColor;
  if (currentFrame == 0) {
    texColor = texture2D(frame0, scrolledUv);
  } else if (currentFrame == 1) {
    texColor = texture2D(frame1, scrolledUv);
  } else if (currentFrame == 2) {
    texColor = texture2D(frame2, scrolledUv);
  } else if (currentFrame == 3) {
    texColor = texture2D(frame3, scrolledUv);
  } else {
    texColor = texture2D(frame4, scrolledUv);
  }

  // Tribes 2 GL_MODULATE: output = texture * vertexColor
  // No gamma correction - textures use NoColorSpace and values pass through
  // directly to display, matching how WaterBlock handles sRGB textures.
  vec3 modulatedColor = texColor.rgb * tintColor;

  float adjustedOpacity = opacity * opacityFactor;

  gl_FragColor = vec4(modulatedColor, adjustedOpacity);

  // Custom fog for additive blending: fade out rather than blend to fog color.
  // Standard fog (mix toward fogColor) doesn't work with additive blending
  // because we'd still be adding fogColor to the framebuffer.
  // Uses Torque's quadratic haze formula for consistency.
  #ifdef USE_FOG
    float dist = vFogDepth;
    float fogFactor = 0.0;
    if (dist > fogNear) {
      if (dist >= fogFar) {
        fogFactor = 1.0;
      } else {
        float fogScale = 1.0 / (fogFar - fogNear);
        float distFactor = (dist - fogNear) * fogScale - 1.0;
        fogFactor = 1.0 - distFactor * distFactor;
      }
    }
    gl_FragColor.a *= 1.0 - fogFactor;
  #endif
}
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