Weiyi Wang wwylele

3DS CRO Information

AKA reference for citra CRO code.

wwylele: I am not a English native speaker, so there can be some strange words and sentences below. Suggestions for improvement are welcome.

Warning: CRO is still not completely understood, and there can be mistakes below. Please keep the sense of suspecting.

Terminology

Note: some terms are given by comparing the behavior with similar concept. They may be inaccurate, or even incorrect.

Module is a chunk of executable code and data. Modules can be linked to each other.

GPU_LUTINPUT_CP

GPU_LUTINPUT_CP (= "cos(phi)") is used for anisotropic reflection, based on Schlick's model. According to the paper, the input value should be T * H', where T is the tangent vector, and H' is the projection of half-angle vector on to the tangent plane.

Here are some (strange) details:

GPU_LUTINPUT_CP is only available under configuration 7
H' is not normalized. This is found when replicating the output from 3ds in citra. Unormalized H' produces the same result, while normalized H' doesn't. This means the angle phi is not the angle between T and H' anymore. On Schlick's paper, it is unclear whether this is the case.
Also found when implementing in citra: when using normal mapping, it seems that the tangent vector stays (1, 0, 0) in surface-local space, instead of rotating with the normal vector. This means the normal and tangent vectors are not perpendicular anymore
Dispite the point above,

	#include <iostream>
	#include <algorithm>
	#include <cmath>
	#include <string>
	#include <sstream>
	using namespace std;

	bool next_operatorPostion(int* operatorPostion,int numberCount){
	int counter = numberCount-2;
	while(1){

	#include <algorithm>
	#include <climits>
	#include <cstdlib>
	#include <iostream>
	#include <stdexcept>
	#include <string>
	#include <vector>

	/*
	bit_trie

	# Python 3
	import struct
	import sys
	import os

	if len(sys.argv)<2:
	print("No input file")
	exit()
	flen=os.path.getsize(sys.argv[1])
	f=open(sys.argv[1], 'rb');

	"$(country_id)_LZ.bin"
	[LZ]{
	struct {
	u32 entry_count?;

	struct { // size=0x818
	struct {
	u8 zero?
	u8 zero?
	u8 region_id;

	#include <3ds.h>
	#include <citro3d.h>
	#include <string.h>
	#include "vshader_shbin.h"
	#include <stdio.h>

	#define CLEAR_COLOR 0xFFB0D8D5

	#define DISPLAY_TRANSFER_FLAGS \
	(GX_TRANSFER_FLIP_VERT(0) \| GX_TRANSFER_OUT_TILED(0) \| GX_TRANSFER_RAW_COPY(0) \| \

	////////////////////////////////////////////////////////////////
	/// Programmable Vertex Shader

	#version 330 core
	#extension GL_ARB_separate_shader_objects : enable // only presents for separable shader

	struct pica_uniforms {
	bool b[16];
	uvec4 i[4];
	vec4 f[96];