Gists for Blog

brightness.frag

const vec3 kY = vec3(0.299, 0.587, 0.114);
const vec3 kCr = vec3(0.5, -0.419, -0.081);
const vec3 kCb = vec3(-0.169, -0.332, 0.5);
vec4 brightness(vec4 color, float val) {
    float Y = dot(kY, color.rgb) + val;
    float Cr = dot(kCr, color.rgb);
    float Cb = dot(kCb, color.rgb);
    float R	= Y+1.402*Cr;
    float G	= Y-0.714*Cr-0.344*Cb;
    float B	= Y+1.772*Cb;
    return vec4(R,G,B,color.a);
}

compile_shader.m

NSString *file = @"shader/file/name";
const GLchar *source;
    
source = (GLchar *)[[NSString stringWithContentsOfFile:file encoding:NSUTF8StringEncoding error:nil] UTF8String];
    
*shader = glCreateShader(type);
glShaderSource(*shader, 1, &source, NULL);
glCompileShader(*shader);

Hello_Gist.m

-(void) testWithCode:(id)code {
    NSLog(@"Hello, Gist!");
}

inverse.frag

precision mediump float;
vec4 inverse(vec4 color)
{
    vec4 newColor;
    newColor.rgb = vec3(1.0) - color.rgb;
    newColor.a = color.a;
    return newColor;
}

model.rb

# coding:utf-8
require 'sequel'

Sequel::Model.plugin :json_serializer
db = Sequel.connect( ENV["DATABASE_URL"] || "sqlite://app.db" )


class User < Sequel::Model
  one_to_many :check_ins, :order=>:timestamp.desc
  many_to_many :places, join_table:"check_ins", uniq:true
end

class CheckIn < Sequel::Model
  many_to_one :user
  many_to_one :place
  def before_create
    self.timestamp ||= Time.now
    super
  end
end

class Place < Sequel::Model
  one_to_many :check_ins, :order=>:timestamp.desc
  many_to_many :users, join_table:"check_ins", uniq:true
end

mruby_compile_sample.c

#include <stdio.h>
#include <mruby.h>
#include <mruby/proc.h>
#include <mruby/compile.h>


int main(void)
{
		int n;
		mrb_state* mrb;
		struct mrb_parser_state* st;
		char* code = "puts 'hello, mruby!'";

		mrb = mrb_open();
		st = mrb_parse_string(mrb, code);
		n = mrb_generate_code(mrb, st->tree);
		mrb_pool_close(st->pool);
		mrb_run(mrb, mrb_proc_new(mrb, mrb->irep[n]), mrb_nil_value());
		return 0;
}