CubicSDR/external/cubicvr2/math/transform.h
2015-06-26 22:04:16 -04:00

176 lines
4.6 KiB
C++

//
// Transform.h
// CubicVR2
//
// Created by Charles J. Cliffe on 2013-02-22.
// Copyright (c) 2013 Charles J. Cliffe. All rights reserved.
//
#ifndef __CubicVR2__Transform__
#define __CubicVR2__Transform__
#include <iostream>
#include "cubic_types.h"
#include "mat4.h"
#include "vec3.h"
#include <vector>
namespace CubicVR {
class transform {
std::vector<mat4> m_stack;
std::vector<mat4> m_cache;
int c_stack;
int valid;
mat4 result;
transform() {
c_stack = 0;
valid = false;
result = mat4::identity();
};
transform(mat4 init_mat) {
clearStack(init_mat);
};
void setIdentity() {
m_stack[c_stack] = mat4(1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f);
if (valid == c_stack && c_stack) {
valid--;
}
}
mat4 getIdentity() {
return mat4(1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f);
}
void invalidate() {
valid = 0;
result = mat4::identity();
}
mat4 getResult() {
if (!c_stack) {
return m_stack[0];
}
mat4 m = getIdentity();
if (valid > c_stack-1) valid = c_stack-1;
for (int i = valid; i < c_stack+1; i++) {
m = mat4::multiply(m, m_stack[i], true);
m_cache[i] = m;
}
valid = c_stack-1;
result = m_cache[c_stack];
return result;
}
void pushMatrix(mat4 m) {
c_stack++;
m_stack[c_stack] = (m ? m : getIdentity());
}
void popMatrix() {
if (c_stack == 0) {
return;
}
c_stack--;
}
void clearStack(mat4 init_mat) {
m_stack.clear();
m_cache.clear();
c_stack = 0;
valid = 0;
delete result;
result = mat4::identity();
if (init_mat != NULL) {
m_stack[0] = init_mat;
} else {
setIdentity();
}
}
void translate(__float x, __float y, __float z) {
mat4 m = getIdentity();
m[12] = x;
m[13] = y;
m[14] = z;
m_stack[c_stack] = mat4::multiply(m, m_stack[c_stack], true);
if (valid == c_stack && c_stack) {
valid--;
}
}
void scale(__float x, __float y, __float z) {
mat4 m = getIdentity();
m[0] = x;
m[5] = y;
m[10] = z;
m_stack[c_stack] = mat4::multiply(m, m_stack[c_stack], true);
if (valid == c_stack && c_stack) {
valid--;
}
}
void rotate(__float ang, __float x, __float y, __float z) {
__float sAng, cAng;
if (x || y || z) {
sAng = sin(-ang * ((float)M_PI / 180.0f));
cAng = cos(-ang * ((float)M_PI / 180.0f));
}
if (x) {
mat4 X_ROT = getIdentity();
X_ROT[5] = cAng * x;
X_ROT[9] = sAng * x;
X_ROT[6] = -sAng * x;
X_ROT[10] = cAng * x;
m_stack[c_stack] = mat4::multiply(m_stack[c_stack], X_ROT, true);
}
if (y) {
mat4 Y_ROT = getIdentity();
Y_ROT[0] = cAng * y;
Y_ROT[8] = -sAng * y;
Y_ROT[2] = sAng * y;
Y_ROT[10] = cAng * y;
m_stack[c_stack] = mat4::multiply(m_stack[c_stack], Y_ROT, true);
}
if (z) {
mat4 Z_ROT = getIdentity();
Z_ROT[0] = cAng * z;
Z_ROT[4] = sAng * z;
Z_ROT[1] = -sAng * z;
Z_ROT[5] = cAng * z;
m_stack[c_stack] = mat4::multiply(m_stack[c_stack], Z_ROT, true);
}
if (valid == c_stack && c_stack) {
valid--;
}
};
};
}
#endif /* defined(__CubicVR2__Transform__) */