irrlicht/tests/projectionMatrix.cpp

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// Copyright (C) 2008-2012 Christian Stehno, Colin MacDonald
// No rights reserved: this software is in the public domain.
#include "testUtils.h"
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;
//! Tests projection matrices
static bool runTestWithDriver(E_DRIVER_TYPE driverType)
{
IrrlichtDevice *device = createDevice( driverType, dimension2d<u32>(160, 120), 32);
if (!device)
return true; // Treat a failure to create a driver as benign; this saves a lot of #ifdefs
IVideoDriver* driver = device->getVideoDriver();
stabilizeScreenBackground(driver);
logTestString("Testing driver %ls\n", driver->getName());
bool result = true;
driver->beginScene(video::ECBF_COLOR, SColor(255,0,0,0));
SMaterial mat;
mat.MaterialType = EMT_SOLID;
mat.Lighting = false;
mat.ZBuffer = false;
mat.ZWriteEnable = video::EZW_OFF;
mat.Thickness = 1;
driver->setMaterial(mat);
core::dimension2d<f32> dims(driver->getCurrentRenderTargetSize());
//apply custom projection, no offset
core::matrix4 pmtx = matrix4().buildProjectionMatrixOrthoLH(dims.Width, dims.Height, 0, 100);
driver->setTransform(ETS_PROJECTION, pmtx);
driver->setTransform(ETS_VIEW, matrix4());
driver->setTransform(ETS_WORLD, matrix4());
//the red cross appears at center
for (u32 i=0; i<10; ++i)
{
driver->draw3DLine(vector3df(0.f+i,-50.f,1.f), vector3df(0.f+i,50.f,1.f), SColor(255,255,0,0));
driver->draw3DLine(vector3df(-50.f,0.f+i,1.f), vector3df(50.f,0.f+i,1.f), SColor(255,255,0,0));
}
//apply custom projection, offset to right-top
pmtx.setTranslation(vector3df(0.7f, 0.7f, 0.f));
driver->setTransform(ETS_PROJECTION, pmtx);
driver->setTransform(ETS_VIEW, matrix4());
driver->setTransform(ETS_WORLD, matrix4());
//The green cross must be in right-top corner. But for OpenGL driver it is in left-top corner
for (u32 i=0; i<10; ++i)
{
driver->draw3DLine(vector3df(0.f+i,-50,1), vector3df(0.f+i,50,1), SColor(255,0,255,0));
driver->draw3DLine(vector3df(-50,0.f+i,1), vector3df(50,0.f+i,1), SColor(255,0,255,0));
}
driver->endScene();
result = takeScreenshotAndCompareAgainstReference(driver, "-projMat.png", 98.71f);
device->closeDevice();
device->run();
device->drop();
return result;
}
bool projectionMatrix(void)
{
bool result = true;
// TODO: Seems that software driver does not handle this projection matrix
TestWithAllDrivers(runTestWithDriver);
return result;
}