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#include "egg/gfx/eggFrustum.h"
#include "egg/gfx/eggGXUtility.h"
#include "egg/gfx/eggStateGX.h"
#include "nw4r/math/math_arithmetic.h"
void eggFrustum_float_ordering() {
1.0f;
}
namespace EGG {
using namespace nw4r;
Frustum::Frustum(ProjectionType proj, const math::VEC2 &size, f32 nearZ, f32 farZ, CanvasMode canvas)
: mProjType(proj),
mCanvasMode(canvas),
mSize(size),
mFovY(45.0f),
mTanFovY(2.4142134f),
mNearZ(nearZ),
mFarZ(farZ),
mOffset(0.0f, 0.0f),
mScale(1.0f, 1.0f, 1.0f),
mFlags(FLAG_DIRTY) {}
Frustum::Frustum(const Frustum &other) {
CopyFromAnother(other);
}
void Frustum::ResetOrthographic(f32 t, f32 b, f32 l, f32 r, f32 near, f32 far) {
0.5f;
2.0f;
mProjType = PROJ_ORTHO;
mScale.z = 1.0f;
mScale.y = 1.0f;
mScale.x = 1.0f;
mSize.x = r - l;
if (mSize.x < 0.0f) {
mScale.x = -1.0f;
mSize.x *= -1.0f;
}
mSize.y = t - b;
if (mSize.y >= 0.0f) {
SetCanvasMode(CANVASMODE_0);
mOffset = math::VEC2(0.5f * (r + l), 0.5f * (t + b));
} else {
SetCanvasMode(CANVASMODE_1);
mOffset = math::VEC2(0.0f, t);
mSize.y *= -1.0f;
}
mNearZ = near;
mFarZ = far;
SetFlag(1);
}
void Frustum::CopyFromAnother(const Frustum &other) {
mProjType = other.mProjType;
mCanvasMode = other.mCanvasMode;
mSize = other.mSize;
mFovY = other.mFovY;
mTanFovY = other.mTanFovY;
mNearZ = other.mNearZ;
mFarZ = other.mFarZ;
mOffset = other.mOffset;
mScale = other.mScale;
mFlags = other.mFlags;
}
void Frustum::SetFovy(f32 fov) {
if (mFovY != fov) {
mFovY = fov;
f32 sin, cos;
math::SinCosDeg(&sin, &cos, (f32)(f64)fov / 2.0f);
mTanFovY = cos / sin;
}
}
void Frustum::ConvertToCanvasLU(f32 ix, f32 iy, f32 *ox, f32 *oy) const {
if (mCanvasMode == CANVASMODE_1) {
*ox = ix;
*oy = iy;
} else if (mCanvasMode == CANVASMODE_0) {
*ox = ix + (mSize.x * 0.5f);
*oy = -(iy - (mSize.y * 0.5f));
}
}
f32 Frustum::GetScreenSizeToViewSize(f32 p1, f32 p2) const {
if (mProjType != PROJ_PERSP) {
return p1;
}
return p1 * math::FAbs(p2) / (mSize.y * 0.5f * mTanFovY);
}
void Frustum::SetProjectionGX() const {
if (mProjType == PROJ_ORTHO) {
SetProjectionOrthographicGX_();
} else {
SetProjectionPerspectiveGX_();
}
}
void Frustum::CopyToG3D(g3d::Camera cam) const {
if (mProjType == PROJ_ORTHO) {
CopyToG3D_Orthographic_(cam);
} else {
CopyToG3D_Perspective_(cam);
}
}
void Frustum::SetGlobalScaleOffset(f32 sx, f32 sy, f32 ox, f32 oy) {
sGlobalScale.x = sx;
sGlobalScale.y = sy;
sGlobalOffset.x = ox;
sGlobalOffset.y = oy;
}
void Frustum::GetGlobalScaleOffset(f32 *sx, f32 *sy, f32 *ox, f32 *oy) {
*sx = sGlobalScale.x;
*sy = sGlobalScale.y;
*ox = sGlobalOffset.x;
*oy = sGlobalOffset.y;
}
void Frustum::SetProjectionPerspectiveGX_() const {
f32 params[7];
GetPerspectiveParam_(params);
StateGX::GXSetProjectionv_(params);
}
void Frustum::SetProjectionOrthographicGX_() const {
f32 v[8];
GetOrthographicParam_(v);
StateGX::GXSetProjectionv_(v);
}
void Frustum::CopyToG3D_Perspective_(g3d::Camera cam) const {
math::MTX44 mtx;
f32 ratio = mSize.x / mSize.y;
cam.SetPerspective(mFovY, ratio, mNearZ, mFarZ);
CalcMtxPerspective_(&mtx);
cam.SetProjectionMtxDirectly(&mtx);
}
void Frustum::CopyToG3D_Orthographic_(g3d::Camera cam) const {
f32 t, b, l, r;
GetOrthographicParam_(&t, &b, &l, &r);
cam.SetOrtho(t, b, l, r, mNearZ, mFarZ);
}
void Frustum::CalcMtxPerspective_(math::MTX44 *out) const {
f32 params[7];
GetPerspectiveParam_(params);
out->m[0][3] = 0.0f;
out->m[0][1] = 0.0f;
out->m[0][0] = params[1];
out->m[0][2] = params[2];
out->m[1][3] = 0.0f;
out->m[1][0] = 0.0f;
out->m[1][1] = params[3];
out->m[1][2] = params[4];
out->m[2][1] = 0.0f;
out->m[2][0] = 0.0f;
out->m[2][2] = params[5];
out->m[2][3] = params[6];
out->m[3][3] = 0.0f;
out->m[3][1] = 0.0f;
out->m[3][0] = 0.0f;
out->m[3][2] = -1.0f;
}
void Frustum::GetPerspectiveParam_(f32 *p) const {
// NONMATCHING - FPR regswaps
f32 f1 = 1.0f / (mSize.x * 0.5f);
f32 f2 = 1.0f / (mSize.y * 0.5f);
p[0] = 0.0f;
p[1] = (mTanFovY / (mScale.x * (mSize.x / mSize.y)));
p[2] = mOffset.x * f1;
p[3] = mTanFovY / mScale.y;
p[4] = mOffset.y * f2;
f32 z = -mNearZ / (mFarZ - mNearZ);
p[5] = z;
p[6] = mFarZ * z;
GXUtility::setScaleOffsetPerspective(p, sGlobalScale.x, sGlobalScale.y, sGlobalOffset.x * f1, sGlobalOffset.y * f2);
}
void Frustum::GetOrthographicParam_(f32 *p) const {
f32 t, b, l, r;
GetOrthographicParam_(&t, &b, &l, &r);
f32 invHor = 1.0f / (r - l);
f32 invVert = 1.0f / (t - b);
f32 invZ = 1.0f / (mFarZ - mNearZ);
p[0] = 1.0f;
p[1] = invHor * 2.0f;
p[2] = invHor * -(r + l);
p[3] = invVert * 2.0f;
p[4] = invVert * -(t + b);
p[5] = -1.0f * invZ;
p[6] = -mFarZ * invZ;
}
void Frustum::GetOrthographicParam_(f32 *pT, f32 *pB, f32 *pL, f32 *pR) const {
f32 adjOffsetX = mOffset.x + sGlobalOffset.x;
f32 adjOffsetY = mOffset.y + sGlobalOffset.y;
if (mCanvasMode == CANVASMODE_0) {
const math::VEC2 adjScale(mScale.x * sGlobalScale.x, mScale.y * sGlobalScale.y);
*pT = adjScale.y * ((0.5f * mSize.y) + adjOffsetY);
*pB = adjScale.y * ((-0.5f * mSize.y) + adjOffsetY);
*pL = adjScale.x * ((-0.5f * mSize.x) + adjOffsetX);
*pR = adjScale.x * ((0.5f * mSize.x) + adjOffsetX);
} else if (mCanvasMode == CANVASMODE_1) {
f32 adjScaleX = -(sGlobalScale.x - 1.0f) * mSize.x / 2.0f;
f32 adjScaleY = -(sGlobalScale.y - 1.0f) * mSize.y / 2.0f;
*pT = adjScaleY + -sGlobalScale.y * adjOffsetY;
*pB = adjScaleY + -sGlobalScale.y * (adjOffsetY + mSize.y * -1.0f * mScale.y);
*pL = adjScaleX + sGlobalScale.x * adjOffsetX;
*pR = adjScaleX + sGlobalScale.x * (adjOffsetX + mSize.x * mScale.x);
}
}
math::VEC2 Frustum::sGlobalScale(1.0f, 1.0f);
math::VEC2 Frustum::sGlobalOffset(0.0f, 0.0f);
} // namespace EGG
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