SLSpheric.cpp

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/**
 * \file      SLSpheric.cpp
 * \date      July 2014
 * \authors   Marcus Hudritsch
 * \copyright http://opensource.org/licenses/GPL-3.0
 * \remarks   Please use clangformat to format the code. See more code style on
 *            https://github.com/cpvrlab/SLProject4/wiki/SLProject-Coding-Style
*/
 
#include <SLSpheric.h>
 
#include <utility>
 
//-----------------------------------------------------------------------------
/*!
SLSpheric::SLSpheric ctor for spheric revolution object around the z-axis.
*/
SLSpheric::SLSpheric(SLAssetManager* assetMgr,
                     SLfloat         sphereRadius,
                     SLfloat         thetaStartDEG,
                     SLfloat         thetaEndDEG,
                     SLuint          stacks,
                     SLuint          slices,
                     SLstring        name,
                     SLMaterial*     mat) : SLRevolver(assetMgr, std::move(name))
{
    assert(slices >= 3 && "Error: Not enough slices.");
    assert(slices > 0 && "Error: Not enough stacks.");
    assert(thetaStartDEG >= 0.0f && thetaStartDEG < 180.0f &&
           "Error: Polar start angle < 0 or > 180");
    assert(thetaEndDEG > 0.0f && thetaEndDEG <= 180.0f &&
           "Error: Polar end angle < 0 or > 180");
    assert(thetaStartDEG < thetaEndDEG &&
           "Error: Polar start angle > end angle");
 
    _radius        = sphereRadius;
    _thetaStartDEG = thetaStartDEG;
    _thetaEndDEG   = thetaEndDEG;
 
    _stacks      = stacks;
    _slices      = slices;
    _smoothFirst = (thetaStartDEG == 0.0f);
    _smoothLast  = (thetaEndDEG == 180.0f);
    _isVolume    = (thetaStartDEG == 0.0f && thetaEndDEG == 180.0f);
    _revAxis.set(0, 0, 1);
    _revPoints.reserve(stacks + 1);
 
    SLfloat theta  = -Utils::PI + thetaStartDEG * Utils::DEG2RAD;
    SLfloat phi    = 0;
    SLfloat dTheta = (thetaEndDEG - thetaStartDEG) * Utils::DEG2RAD / stacks;
 
    for (SLuint i = 0; i <= stacks; ++i)
    {
        SLVec3f p;
        p.fromSpherical(sphereRadius, theta, phi);
        _revPoints.push_back(p);
        theta += dTheta;
    }
 
    buildMesh(mat);
}
//-----------------------------------------------------------------------------