Method GetDrawableArea

tests/live2d-tests/Source/LAppModel.cpp:702–753

}

csmRectF LAppModel::GetDrawableArea(csmInt32 drawableIndex, const CubismMatrix44& vpMatrix, const CubismVector2& windowSize) const
{
    CubismMatrix44 currentMatrix(vpMatrix);         //Matrixをコピーしないと変質が次回に影響する
    currentMatrix.MultiplyByMatrix(_modelMatrix);

    const csmInt32 count = _model->GetDrawableVertexCount(drawableIndex);
    const csmFloat32* vertices = _model->GetDrawableVertices(drawableIndex);

    csmFloat32 left = vertices[0];
    csmFloat32 right = vertices[0];
    csmFloat32 top = vertices[1];
    csmFloat32 bottom = vertices[1];

    for (csmInt32 j = 1; j < count; ++j)
    {
        CubismVector2 pos;

        pos.X = vertices[Constant::VertexOffset + j * Constant::VertexStep];
        pos.Y = vertices[Constant::VertexOffset + j * Constant::VertexStep + 1];

        if (pos.X < left)
        {
            left = pos.X; // Min x
        }

        if (pos.X > right)
        {
            right = pos.X; // Max x
        }

        if (pos.Y < top)
        {
            top = pos.Y; // Min y
        }

        if (pos.Y > bottom)
        {
            bottom = pos.Y; // Max y
        }
    }

    csmFloat32 convertLeft   = left  * currentMatrix.GetArray()[0] + top    * currentMatrix.GetArray()[1];
    convertLeft   = convertLeft   * windowSize.X / 2 + windowSize.X / 2;
    csmFloat32 convertTop    = left  * currentMatrix.GetArray()[4] + top    * currentMatrix.GetArray()[5];
    convertTop    = convertTop    * windowSize.Y / 2 + windowSize.Y / 2;
    csmFloat32 convertRight  = right * currentMatrix.GetArray()[0] + bottom * currentMatrix.GetArray()[1];
    convertRight  = convertRight  * windowSize.X / 2 + windowSize.X / 2;
    csmFloat32 convertBottom = right * currentMatrix.GetArray()[4] + bottom * currentMatrix.GetArray()[5];
    convertBottom = convertBottom * windowSize.Y / 2 + windowSize.Y / 2;

    return csmRectF(convertLeft, convertTop, (convertRight - convertLeft), (convertBottom - convertTop));
}

void LAppModel::MakeRenderingTarget()
{