Contents

# frozen_string_literal: true

module Engine
  class Material
    attr_reader :shader

    def initialize(shader)
      @shader = shader
    end

    def set_mat4(name, value)
      mat4s[name] = value
    end

    def set_vec3(name, value)
      vec3s[name] = value
    end

    def set_vec4(name, value)
      vec4s[name] = value
    end

    def set_float(name, value)
      floats[name] = value
    end

    def set_texture(name, value)
      textures[name] = value
    end

    def update_shader
      shader.use

      mat4s.each do |name, value|
        shader.set_mat4(name, value)
      end
      vec3s.each do |name, value|
        shader.set_vec3(name, value)
      end
      vec4s.each do |name, value|
        shader.set_vec4(name, value)
      end
      floats.each do |name, value|
        shader.set_float(name, value)
      end
      textures.each.with_index do |(name, value), slot|
        GL.ActiveTexture(Object.const_get("GL::TEXTURE#{slot}"))
        if value
          GL.BindTexture(GL::TEXTURE_2D, value)
        else
          GL.BindTexture(GL::TEXTURE_2D, 0)
        end
        shader.set_int(name, slot)
      end
    end

    private

    def mat4s
      @mat4s ||= {}
    end

    def vec3s
      @vec3s ||= {}
    end

    def vec4s
      @vec4s ||= {}
    end

    def floats
      @floats ||= {}
    end

    def textures
      @textures ||= {}
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
ruby_rpg-0.0.4	lib/engine/material.rb
ruby_rpg-0.0.3	lib/engine/material.rb
ruby_rpg-0.0.2	lib/engine/material.rb