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72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
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#include "gl/stereo3d/gl_stereo3d.h"
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#include "vectors.h" // RAD2DEG
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#include "doomtype.h" // M_PI
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namespace s3d {
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/* virtual */
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void EyePose::GetProjection(float fov, float aspectRatio, float fovRatio, GLdouble m[4][4]) const
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{
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// Lifted from gl_scene.cpp FGLRenderer::SetProjection()
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float fovy = 2 * RAD2DEG(atan(tan(DEG2RAD(fov) / 2) / fovRatio));
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const double zNear = 5.0;
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const double zFar = 65536.0;
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double sine, cotangent, deltaZ;
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double radians = fovy / 2 * M_PI / 180;
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deltaZ = zFar - zNear;
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sine = sin(radians);
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if ((deltaZ == 0) || (sine == 0) || (aspectRatio == 0)) {
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return;
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}
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cotangent = cos(radians) / sine;
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memset(m, 0, 16*sizeof(GLdouble));
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m[0][0] = cotangent / aspectRatio;
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m[1][1] = cotangent;
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m[2][2] = -(zFar + zNear) / deltaZ;
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m[2][3] = -1;
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m[3][2] = -2 * zNear * zFar / deltaZ;
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m[3][3] = 0;
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}
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/* virtual */
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Viewport EyePose::GetViewport(const Viewport& fullViewport) const
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{
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return fullViewport;
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}
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/* virtual */
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void EyePose::GetViewShift(float yaw, float outViewShift[3]) const
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{
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// pass-through for Mono view
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outViewShift[0] = 0;
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outViewShift[1] = 0;
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outViewShift[2] = 0;
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}
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Stereo3DMode::Stereo3DMode()
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{
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}
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Stereo3DMode::~Stereo3DMode()
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{
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}
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// Avoid static initialization order fiasco by declaring first Mode type (Mono) here in the
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// same source file as Stereo3DMode::getCurrentMode()
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// https://isocpp.org/wiki/faq/ctors#static-init-order
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/* static */
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const MonoView& MonoView::getInstance()
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{
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static MonoView instance;
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return instance;
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}
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} /* namespace s3d */
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