mirror of
https://github.com/wiidev/usbloadergx.git
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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
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/****************************************************************************
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* Copyright (C) 2012 Dimok
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include <gccore.h>
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void GX_Project(f32 mx, f32 my, f32 mz, Mtx mv, const f32 *projection,
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const f32 *viewport, f32 *sx, f32 *sy, f32 *sz)
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{
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float x, y, z, w;
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guVector vec = (guVector) { mx, my, mz };
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guVector vecRes;
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guVecMultiply(mv, &vec, &vecRes);
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if(projection[0] == GX_PERSPECTIVE)
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{
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x = (vecRes.x * projection[1]) + (vecRes.z * projection[2]);
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y = (vecRes.y * projection[3]) + (vecRes.z * projection[4]);
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z = (vecRes.z * projection[5]) + projection[6];
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w = -1.0f / vecRes.z;
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}
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else
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{
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x = (vecRes.x * projection[1]) + projection[2];
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y = (vecRes.y * projection[3]) + projection[4];
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z = (vecRes.z * projection[5]) + projection[6];
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w = 1.0f;
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}
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*sx = viewport[0] + (w * x * viewport[2] + viewport[2]) * 0.5f;
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*sy = viewport[1] - (w * y * viewport[3] - viewport[3]) * 0.5f;
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*sz = viewport[5] + (w * z * (viewport[5] - viewport[4]));
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}
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void GX_GetProjectionv( f32* ptr, Mtx44 p, u8 type)
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{
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ptr[0] = (f32)type;
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ptr[1] = p[0][0];
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ptr[3] = p[1][1];
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ptr[5] = p[2][2];
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ptr[6] = p[2][3];
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if(type == GX_PERSPECTIVE)
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{
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ptr[2] = p[0][2];
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ptr[4] = p[1][2];
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}
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else
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{
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ptr[2] = p[0][3];
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ptr[4] = p[1][3];
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}
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}
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void GX_GetViewportv( f32* ptr, GXRModeObj *vmode )
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{
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ptr[0] = 0.0f;
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ptr[1] = 0.0f;
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ptr[2] = vmode->fbWidth;
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ptr[3] = vmode->efbHeight;
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ptr[4] = 0.0f;
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ptr[5] = 1.0f;
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}
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