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corrects projection matricies for opengl

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This commit is contained in:
Azaezel 2016-04-05 20:36:13 -05:00
parent 6a40b8bb84
commit 223e9a8264
1 changed files with 9 additions and 5 deletions
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14
Engine/source/math/mathUtils.cpp
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@ -30,6 +30,7 @@
#include "platform/profiler.h"
#include "core/tAlgorithm.h"
#include "gfx/gfxDevice.h"
namespace MathUtils
{
@ -1449,6 +1450,7 @@ void makeProjection( MatrixF *outMatrix,
F32 farPlane,
bool gfxRotate )
{
bool isGL = GFX->getAdapterType() == OpenGL;
Point4F row;
row.x = 2.0*nearPlane / (right-left);
@ -1465,13 +1467,13 @@ void makeProjection( MatrixF *outMatrix,
row.x = (left+right) / (right-left);
row.y = (top+bottom) / (top-bottom);
row.z = farPlane / (nearPlane-farPlane);
row.z = isGL ? -(farPlane + nearPlane) / (farPlane - nearPlane) : farPlane / (nearPlane - farPlane);
row.w = -1.0;
outMatrix->setRow( 2, row );
row.x = 0.0;
row.y = 0.0;
row.z = nearPlane * farPlane / (nearPlane-farPlane);
row.z = isGL ? 2 * nearPlane * farPlane / (nearPlane - farPlane) : nearPlane * farPlane / (nearPlane - farPlane);
row.w = 0.0;
outMatrix->setRow( 3, row );
@ -1492,6 +1494,8 @@ void makeOrthoProjection( MatrixF *outMatrix,
F32 farPlane,
bool gfxRotate )
{
bool isGL = GFX->getAdapterType() == OpenGL;
Point4F row;
row.x = 2.0f / (right - left);
row.y = 0.0f;
@ -1509,15 +1513,15 @@ void makeOrthoProjection( MatrixF *outMatrix,
row.y = 0.0f;
row.w = 0.0f;
// This may need be modified to work with OpenGL (d3d has 0..1
// This needs to be modified to work with OpenGL (d3d has 0..1
// projection for z, vs -1..1 in OpenGL)
row.z = 1.0f / (nearPlane - farPlane);
row.z = isGL ? 2.0f / (nearPlane - farPlane) : 1.0f / (nearPlane - farPlane);
outMatrix->setRow( 2, row );
row.x = (left + right) / (left - right);
row.y = (top + bottom) / (bottom - top);
row.z = nearPlane / (nearPlane - farPlane);
row.z = isGL ? (nearPlane + farPlane) / (nearPlane - farPlane) : nearPlane / (nearPlane - farPlane);
row.w = 1.0f;
outMatrix->setRow( 3, row );