#include "glcone.h"

GLCone::GLCone(QVector3D lowerMiddlePoint, double lowerRadius, double upperRadius, double height,
               int sides, GLColorRgba color, QString textureFile)
    : GLDisc(lowerRadius, height, lowerMiddlePoint, sides, color, textureFile)
{
    m_height = height;
    m_sides = sides;

    m_center = v_Z * 0.5 * m_height;

    m_circleRadius = lowerRadius;

    m_upperCircleRadius = upperRadius;

    m_lowerMiddlePoint = lowerMiddlePoint;
}

void GLCone::makeSurface(QVector<GLPoint> *pointContainer,
                         QVector<GLshort> *indexContainer)
{
    GLBody::makeSurface(pointContainer, indexContainer);

    m_firstPoint = m_points->size();

    m_points->append(GLPoint(v_Zero, -v_Z, QVector3D(0.5, 0.5, 0.0), m_color));

    for (int side = 0; side < m_sides; side++)
    {
        QVector3D tmp = calculatePoint(side * 2 * M_PI / m_sides);

        QVector3D tmpTextCoo = (0.5 * tmp) + QVector3D(0.5, 0.5, 0.0);
        QVector3D topBarrel = QVector3D(m_upperCircleRadius * tmp .x(), m_upperCircleRadius * tmp .y(), m_height);
        QVector3D bottomBarrel = m_circleRadius * tmp;
        QVector3D tangent = QVector3D::crossProduct(bottomBarrel, v_Z);
        QVector3D barrelVector = topBarrel - bottomBarrel;
        QVector3D barrelNormal = QVector3D::crossProduct(barrelVector, tangent);

        m_points->append(GLPoint(bottomBarrel, -v_Z, tmpTextCoo, m_color));
        m_points->append(GLPoint(bottomBarrel, barrelNormal, tmpTextCoo, m_color));
        m_points->append(GLPoint(topBarrel, barrelNormal,
                                 tmpTextCoo, m_color));
        m_points->append(GLPoint(topBarrel, v_Z,
                                 tmpTextCoo, m_color));
    }

    m_points->append(GLPoint(m_height * v_Z, v_Z, QVector3D(0.5, 0.5, 0.0),
                             m_color));

    m_nextPoint = m_points->size();

    m_firstIndex = m_indices->size();

    for (int side = 0; side < m_sides - 1; side++)
    {
        m_indices->append(m_firstPoint);
        m_indices->append(m_firstPoint + 1 + 4 * side);
        m_indices->append(m_firstPoint + 5 + 4 * side);

        m_indices->append(m_firstPoint + 2 + 4 * side);
        m_indices->append(m_firstPoint + 6 + 4 * side);
        m_indices->append(m_firstPoint + 3 + 4 * side);

        m_indices->append(m_firstPoint + 3 + 4 * side);
        m_indices->append(m_firstPoint + 7 + 4 * side);
        m_indices->append(m_firstPoint + 6 + 4 * side);

        m_indices->append(m_firstPoint + 4 + 4 * side);
        m_indices->append(m_firstPoint + 8 + 4 * side);
        m_indices->append(m_nextPoint - 1);
    }

    m_indices->append(m_firstPoint);
    m_indices->append(m_firstPoint + 1 + 4 * (m_sides - 1));
    m_indices->append(m_firstPoint + 1);

    m_indices->append(m_firstPoint + 2 + 4 * (m_sides - 1));
    m_indices->append(m_firstPoint + 2);
    m_indices->append(m_firstPoint + 3 + 4 * (m_sides - 1));

    m_indices->append(m_firstPoint + 3 + 4 * (m_sides - 1));
    m_indices->append(m_firstPoint + 3);
    m_indices->append(m_firstPoint + 2);

    m_indices->append(m_firstPoint + 4 + 4 * (m_sides - 1));
    m_indices->append(m_firstPoint + 4);
    m_indices->append(m_nextPoint - 1);

    m_nextIndex = m_indices->size();
}

void GLCone::draw(GLESRenderer *renderer)
{
    renderer->pushMvMatrix();

    renderer->translate(m_lowerMiddlePoint);

    GLBody::draw(renderer);

    renderer->popMvMatrix();
}