Mothback/data/shaders.lua

Shaders = {}
Shaders.InsideLight = love.graphics.newShader[[
  uniform vec2 light_pos;
  uniform vec3 light_color;
  uniform float range;
  uniform float game_scale;

  vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords ){

    vec4 pixel = Texel(texture, texture_coords );//This is the current pixel color

    float distance_x = light_pos.x - screen_coords.x;
    float distance_y = light_pos.y - screen_coords.y;
    float distance = sqrt( pow(distance_x,2) + pow(distance_y,2) ) / game_scale;
    if (distance < range){
      float alpha = 1-(distance/10);
      pixel.a = alpha;
      if (color.r<light_color.r){
        color.r = light_color.r;
      }
      if (color.g<light_color.g){
        color.g = light_color.g;
      }
      if (color.b<light_color.b){
        color.b = light_color.b;
      }
    }
    return pixel * color;
  }
]]

Shaders.OutsideDark = love.graphics.newShader[[
  uniform vec2 light_pos;
  uniform float range;
  uniform float game_scale;

  vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords ){

    vec4 pixel = Texel(texture, texture_coords );//This is the current pixel color

    float distance_x = light_pos.x - screen_coords.x;
    float distance_y = light_pos.y - screen_coords.y;
    float distance = sqrt( pow(distance_x,2) + pow(distance_y,2) ) / game_scale;
    if (distance < range){
      float alpha = (distance/range);
      if (pixel.a > alpha){
        pixel.a = alpha;
      }
    }
    return pixel * color;
  }
]]