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Factorize a function and add proper doxy comment.

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This commit is contained in:
Vincent Lejeune
2014-07-10 00:38:13 +02:00
parent 1324fa7b36
commit 0e4b9040d6
1 changed files with 53 additions and 47 deletions
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100
src/graphics/render.cpp
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@@ -933,6 +933,47 @@ void IrrDriver::renderParticles()
m_scene_manager->drawAll(scene::ESNRP_TRANSPARENT_EFFECT);
}
/** Given a matrix transform and a set of points returns an orthogonal projection matrix that maps coordinates of
transformed points between -1 and 1.
* \param transform a transform matrix.
* \param pointsInside a vector of point in 3d space.
*/
core::matrix4 getTighestFitOrthoProj(const core::matrix4 &transform, const std::vector<vector3df> &pointsInside)
{
float xmin = std::numeric_limits<float>::infinity();
float xmax = -std::numeric_limits<float>::infinity();
float ymin = std::numeric_limits<float>::infinity();
float ymax = -std::numeric_limits<float>::infinity();
float zmin = std::numeric_limits<float>::infinity();
float zmax = -std::numeric_limits<float>::infinity();
for (unsigned i = 0; i < pointsInside.size(); i++)
{
vector3df TransformedVector;
transform.transformVect(TransformedVector, pointsInside[i]);
xmin = MIN2(xmin, TransformedVector.X);
xmax = MAX2(xmax, TransformedVector.X);
ymin = MIN2(ymin, TransformedVector.Y);
ymax = MAX2(ymax, TransformedVector.Y);
zmin = MIN2(zmin, TransformedVector.Z);
zmax = MAX2(zmax, TransformedVector.Z);
}
float left = xmin;
float right = xmax;
float up = ymin;
float down = ymax;
core::matrix4 tmp_matrix;
// Prevent Matrix without extend
if (left == right || up == down)
return tmp_matrix;
tmp_matrix.buildProjectionMatrixOrthoLH(left, right,
down, up,
30, zmax);
return tmp_matrix;
}
void IrrDriver::computeCameraMatrix(scene::ICameraSceneNode * const camnode, size_t width, size_t height)
{
m_scene_manager->drawAll(scene::ESNRP_CAMERA);
@@ -1015,34 +1056,17 @@ void IrrDriver::computeCameraMatrix(scene::ICameraSceneNode * const camnode, siz
core::aabbox3df box = smallcambox;
box = box.intersect(trackbox);
float xmin = std::numeric_limits<float>::infinity();
float xmax = -std::numeric_limits<float>::infinity();
float ymin = std::numeric_limits<float>::infinity();
float ymax = -std::numeric_limits<float>::infinity();
float zmin = std::numeric_limits<float>::infinity();
float zmax = -std::numeric_limits<float>::infinity();
const vector3df vectors[] =
{
frustrum->getFarLeftDown(),
frustrum->getFarLeftUp(),
frustrum->getFarRightDown(),
frustrum->getFarRightUp(),
frustrum->getNearLeftDown(),
frustrum->getNearLeftUp(),
frustrum->getNearRightDown(),
frustrum->getNearRightUp()
};
for (unsigned j = 0; j < 8; j++)
{
vector3df vector;
SunCamViewMatrix.transformVect(vector, vectors[j]);
xmin = MIN2(xmin, vector.X);
xmax = MAX2(xmax, vector.X);
ymin = MIN2(ymin, vector.Y);
ymax = MAX2(ymax, vector.Y);
zmin = MIN2(zmin, vector.Z);
zmax = MAX2(zmax, vector.Z);
}
std::vector<vector3df> vectors;
vectors.push_back(frustrum->getFarLeftDown());
vectors.push_back(frustrum->getFarLeftUp());
vectors.push_back(frustrum->getFarRightDown());
vectors.push_back(frustrum->getFarRightUp());
vectors.push_back(frustrum->getNearLeftDown());
vectors.push_back(frustrum->getNearLeftUp());
vectors.push_back(frustrum->getNearRightDown());
vectors.push_back(frustrum->getNearRightUp());
/* SunCamViewMatrix.transformBoxEx(trackbox);
SunCamViewMatrix.transformBoxEx(box);
@@ -1055,25 +1079,7 @@ void IrrDriver::computeCameraMatrix(scene::ICameraSceneNode * const camnode, siz
const float units_per_w = w / 1024;
const float units_per_h = h / 1024;*/
float left = xmin;
float right = xmax;
float up = ymin;
float down = ymax;
core::matrix4 tmp_matrix;
// Prevent Matrix without extend
if (left == right || up == down)
{
Log::error("Shadows", "Shadows Near/Far plane have a 0 area");
sun_ortho_matrix.push_back(tmp_matrix);
continue;
}
tmp_matrix.buildProjectionMatrixOrthoLH(left, right,
down, up,
30, zmax);
m_suncam->setProjectionMatrix(tmp_matrix, true);
m_suncam->setProjectionMatrix(getTighestFitOrthoProj(SunCamViewMatrix, vectors) , true);
m_suncam->render();
sun_ortho_matrix.push_back(getVideoDriver()->getTransform(video::ETS_PROJECTION) * getVideoDriver()->getTransform(video::ETS_VIEW));