Method vector_field_impl

src/backend/opengl/vector_field_impl.cpp:90–150

}

vector_field_impl::vector_field_impl(const uint pNumPoints, const forge::dtype pDataType, const int pD)
    : mDimension(pD), mNumPoints(pNumPoints), mDataType(pDataType),
    mGLType(dtype2gl(mDataType)),
    mFieldProgram(pD==2 ? glsl::vector_field2d_vs.c_str() : glsl::vector_field_vs.c_str(),
                  glsl::histogram_fs.c_str(),
                  pD==2 ? glsl::vector_field2d_gs.c_str() : glsl::vector_field_gs.c_str()),
    mDBO(-1), mDBOSize(0), mFieldPointIndex(-1),
    mFieldColorIndex(-1), mFieldAlphaIndex(-1), mFieldDirectionIndex(-1),
    mFieldPVMatIndex(-1), mFieldModelMatIndex(-1), mFieldAScaleMatIndex(-1),
    mFieldPVCOnIndex(-1), mFieldPVAOnIndex(-1), mFieldUColorIndex(-1)
{
    CheckGL("Begin vector_field_impl::vector_field_impl");

    setColor(0, 1, 0, 1);

    if (mDimension==2) {
        mVBOSize = 2*mNumPoints;
        mDBOSize = 2*mNumPoints;
    } else {
        mVBOSize = 3*mNumPoints;
        mDBOSize = 3*mNumPoints;
    }

    mCBOSize = 3*mNumPoints;
    mABOSize = mNumPoints;

    mFieldPointIndex  = mFieldProgram.getAttributeLocation("point");
    mFieldColorIndex  = mFieldProgram.getAttributeLocation("color");
    mFieldAlphaIndex  = mFieldProgram.getAttributeLocation("alpha");
    mFieldDirectionIndex  = mFieldProgram.getAttributeLocation("direction");

    mFieldPVMatIndex     = mFieldProgram.getUniformLocation("viewMat");
    mFieldModelMatIndex  = mFieldProgram.getUniformLocation("modelMat");
    mFieldAScaleMatIndex = mFieldProgram.getUniformLocation("arrowScaleMat");

    mFieldPVCOnIndex  = mFieldProgram.getUniformLocation("isPVCOn");
    mFieldPVAOnIndex  = mFieldProgram.getUniformLocation("isPVAOn");
    mFieldUColorIndex = mFieldProgram.getUniformLocation("barColor");

#define PLOT_CREATE_BUFFERS(type)   \
        mVBO = createBuffer<type>(GL_ARRAY_BUFFER, mVBOSize, NULL, GL_DYNAMIC_DRAW);    \
        mCBO = createBuffer<float>(GL_ARRAY_BUFFER, mCBOSize, NULL, GL_DYNAMIC_DRAW);   \
        mABO = createBuffer<float>(GL_ARRAY_BUFFER, mABOSize, NULL, GL_DYNAMIC_DRAW);   \
        mDBO = createBuffer<float>(GL_ARRAY_BUFFER, mDBOSize, NULL, GL_DYNAMIC_DRAW);   \
        mVBOSize *= sizeof(type);   \
        mCBOSize *= sizeof(float);  \
        mABOSize *= sizeof(float);  \
        mDBOSize *= sizeof(float);

        switch(mGLType) {
            case GL_FLOAT          : PLOT_CREATE_BUFFERS(float) ; break;
            case GL_INT            : PLOT_CREATE_BUFFERS(int)   ; break;
            case GL_UNSIGNED_INT   : PLOT_CREATE_BUFFERS(uint)  ; break;
            case GL_SHORT          : PLOT_CREATE_BUFFERS(short) ; break;
            case GL_UNSIGNED_SHORT : PLOT_CREATE_BUFFERS(ushort); break;
            case GL_UNSIGNED_BYTE  : PLOT_CREATE_BUFFERS(float) ; break;
            default                : TYPE_ERROR(1, mDataType);
        }