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transform.cpp
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transform.cpp
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/******************************************************
g-Matrix3D Neo Engine
Copyright (c)2003 Kim Seong Wan (kaswan, Â𝧹ͽĹ)
E-mail: [email protected]
http://www.g-matrix.pe.kr
*******************************************************/
#include "stdafx.h"
#include "util.h"
#include "transform.h"
void CTransform::RotateX(float theta)
{
Matrix4 M;
float Sin = sinf(theta);
float Cos = cosf(theta);
M._11 = 1;
M._12 = 0;
M._13 = 0;
M._14 = 0;
M._21 = 0;
M._22 = Cos;
M._23 = Sin;
M._24 = 0;
M._31 = 0;
M._32 = -Sin;
M._33 = Cos;
M._34 = 0;
M._41 = 0;
M._42 = 0;
M._43 = 0;
M._44 = 1;
TM[CurrentMode] *= M;
}
void CTransform::RotateY(float theta)
{
Matrix4 M;
float Sin = sinf(theta);
float Cos = cosf(theta);
M._11 = Cos;
M._12 = 0;
M._13 = -Sin;
M._14 = 0;
M._21 = 0;
M._22 = 1;
M._23 = 0;
M._24 = 0;
M._31 = Sin;
M._32 = 0;
M._33 = Cos;
M._34 = 0;
M._41 = 0;
M._42 = 0;
M._43 = 0;
M._44 = 1;
TM[CurrentMode] *= M;
}
void CTransform::RotateZ(float theta)
{
Matrix4 M;
float Sin = sinf(theta);
float Cos = cosf(theta);
M._11 = Cos;
M._12 = Sin;
M._13 = 0;
M._14 = 0;
M._21 = -Sin;
M._22 = Cos;
M._23 = 0;
M._24 = 0;
M._31 = 0;
M._32 = 0;
M._33 = 1;
M._34 = 0;
M._41 = 0;
M._42 = 0;
M._43 = 0;
M._44 = 1;
TM[CurrentMode] *= M;
}
void CTransform::Scale(float x, float y, float z)
{
Matrix4 M;
M._11 = x;
M._12 = 0;
M._13 = 0;
M._14 = 0;
M._21 = 0;
M._22 = y;
M._23 = 0;
M._24 = 0;
M._31 = 0;
M._32 = 0;
M._33 = z;
M._34 = 0;
M._41 = 0;
M._42 = 0;
M._43 = 0;
M._44 = 1;
TM[CurrentMode] *= M;
}
void CTransform::Translate(float x, float y, float z)
{
Matrix4 M;
M._11 = 1;
M._12 = 0;
M._13 = 0;
M._14 = 0;
M._21 = 0;
M._22 = 1;
M._23 = 0;
M._24 = 0;
M._31 = 0;
M._32 = 0;
M._33 = 1;
M._34 = 0;
M._41 = x;
M._42 = y;
M._43 = z;
M._44 = 1;
TM[CurrentMode] *= M;
}
void CTransform::LoadIndentity(void)
{
TM[CurrentMode]._11 = 1;
TM[CurrentMode]._12 = 0;
TM[CurrentMode]._13 = 0;
TM[CurrentMode]._14 = 0;
TM[CurrentMode]._21 = 0;
TM[CurrentMode]._22 = 1;
TM[CurrentMode]._23 = 0;
TM[CurrentMode]._24 = 0;
TM[CurrentMode]._31 = 0;
TM[CurrentMode]._32 = 0;
TM[CurrentMode]._33 = 1;
TM[CurrentMode]._34 = 0;
TM[CurrentMode]._41 = 0;
TM[CurrentMode]._42 = 0;
TM[CurrentMode]._43 = 0;
TM[CurrentMode]._44 = 1;
}
void CTransform::SimplePerspective(void)
{
TM[CurrentMode]._11 = 1;
TM[CurrentMode]._12 = 0;
TM[CurrentMode]._13 = 0;
TM[CurrentMode]._14 = 0;
TM[CurrentMode]._21 = 0;
TM[CurrentMode]._22 = 1;
TM[CurrentMode]._23 = 0;
TM[CurrentMode]._24 = 0;
TM[CurrentMode]._31 = 0;
TM[CurrentMode]._32 = 0;
TM[CurrentMode]._33 = 1;
TM[CurrentMode]._34 = 1;
TM[CurrentMode]._41 = 0;
TM[CurrentMode]._42 = 0;
TM[CurrentMode]._43 = 0;
TM[CurrentMode]._44 = 0;
}
void CTransform::Perspective(float width, float height, float nearz, float farz)
{
TM[CurrentMode]._11 = 2 * nearz / width;
TM[CurrentMode]._12 = 0;
TM[CurrentMode]._13 = 0;
TM[CurrentMode]._14 = 0;
TM[CurrentMode]._21 = 0;
TM[CurrentMode]._22 = 2 * nearz / height;
TM[CurrentMode]._23 = 0;
TM[CurrentMode]._24 = 0;
TM[CurrentMode]._31 = 0;
TM[CurrentMode]._32 = 0;
TM[CurrentMode]._33 = 1 / (farz - nearz);
TM[CurrentMode]._34 = 1;
TM[CurrentMode]._41 = 0;
TM[CurrentMode]._42 = 0;
TM[CurrentMode]._43 = -nearz / (farz - nearz);
TM[CurrentMode]._44 = 0;
}
void CTransform::PerspectiveFOVW(float fovw, float aspectw, float nearz, float farz)
{
float dfov = fovw * PI / 180;
float width = 2 * (nearz * tanf(dfov * 0.5f));
float height = width * aspectw;
TM[CurrentMode]._11 = 2 * nearz / width;
TM[CurrentMode]._12 = 0;
TM[CurrentMode]._13 = 0;
TM[CurrentMode]._14 = 0;
TM[CurrentMode]._21 = 0;
TM[CurrentMode]._22 = 2 * nearz / height;
TM[CurrentMode]._23 = 0;
TM[CurrentMode]._24 = 0;
TM[CurrentMode]._31 = 0;
TM[CurrentMode]._32 = 0;
TM[CurrentMode]._33 = farz / (farz - nearz);
TM[CurrentMode]._34 = 1;
TM[CurrentMode]._41 = 0;
TM[CurrentMode]._42 = 0;
TM[CurrentMode]._43 = -(nearz * farz) / (farz - nearz);
TM[CurrentMode]._44 = 0;
}
void CTransform::PerspectiveFOVH(float fovh, float aspecth, float nearz, float farz)
{
float dfov = fovh * PI / 180;
float height = 2 * (nearz * tanf(dfov * 0.5f));
float width = height * aspecth;
TM[CurrentMode]._11 = 2 * nearz / width;
TM[CurrentMode]._12 = 0;
TM[CurrentMode]._13 = 0;
TM[CurrentMode]._14 = 0;
TM[CurrentMode]._21 = 0;
TM[CurrentMode]._22 = 2 * nearz / height;
TM[CurrentMode]._23 = 0;
TM[CurrentMode]._24 = 0;
TM[CurrentMode]._31 = 0;
TM[CurrentMode]._32 = 0;
TM[CurrentMode]._33 = farz / (farz - nearz);
TM[CurrentMode]._34 = 1;
TM[CurrentMode]._41 = 0;
TM[CurrentMode]._42 = 0;
TM[CurrentMode]._43 = -(nearz * farz) / (farz - nearz);
TM[CurrentMode]._44 = 0;
}
void CTransform::SetTransform(void)
{
WorldViewTM = TM[MM_WORLD] * TM[MM_VIEW];
WorldViewProjectTM = TM[MM_WORLD] * TM[MM_VIEW] * TM[MM_PROJECT];
NormalTM._11 = WorldViewTM._11;
NormalTM._12 = WorldViewTM._12;
NormalTM._13 = WorldViewTM._13;
NormalTM._21 = WorldViewTM._21;
NormalTM._22 = WorldViewTM._22;
NormalTM._23 = WorldViewTM._23;
NormalTM._31 = WorldViewTM._31;
NormalTM._32 = WorldViewTM._32;
NormalTM._33 = WorldViewTM._33;
NormalTM.Inverse();
NormalTM.Transpose();
}