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top/bottom were swapped for off axis projection

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This commit is contained in:
Ian Curtis 2018-01-10 16:08:02 +00:00
parent 6efa03112e
commit d708ce9ba2
1 changed files with 2 additions and 4 deletions
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6
Src/Graphics/New3D/New3D.cpp
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@ -757,12 +757,10 @@ void CNew3D::RenderViewport(UINT32 addr)
m_LODBlendTable = (LODBlendTable*)TranslateCullingAddress(vpnode[0x17] & 0xFFFFFF);
/*
vp->angle_left = -atan2(*(float *)&vpnode[12], *(float *)&vpnode[13]); // These values work out as the normals for the clipping planes.
vp->angle_right = atan2(*(float *)&vpnode[16], -*(float *)&vpnode[17]); // Sometimes these values (dirt devils,lost world) are totally wrong
vp->angle_top = atan2(*(float *)&vpnode[14], *(float *)&vpnode[15]); // and don't work for the frustum values exactly.
vp->angle_bottom = -atan2(*(float *)&vpnode[18], -*(float *)&vpnode[19]); // Perhaps they are just used for culling and not rendering.
*/
float cv = *(float *)&vpnode[0x8]; // 1/tan(left-right)
float cw = *(float *)&vpnode[0x9]; // 1/tan(top-bottom)
@ -771,8 +769,8 @@ void CNew3D::RenderViewport(UINT32 addr)
float left = (1.0f / cv) * (0.0f - jo);
float right = (1.0f / cv) * (1.0f - jo);
float bottom = (1.0f / cw) * (0.0f - io);
float top = (1.0f / cw) * (1.0f - io);
float bottom = (1.0f / cw) * -(1.0f - io);
float top = (1.0f / cw) * -(0.0f - io);
vp->angle_left = std::atan(left); // probably could skip atan
vp->angle_right = std::atan(right);