source: projectionDesigner/trunk/projdesignerplugins/defaultplugin/DefaultProjectorData.h @ 80

#ifndef __DEFAULT_PROJECTOR_DATA_H__
#define __DEFAULT_PROJECTOR_DATA_H__

// Includes Projection Designer headers
#include <projdesigner/include/interfaces.h>


/**
 * Implementation of the DefaultProjectorWidget class.
 *
 * This class is where the projector is really implemented. Attributes are the
 * frustum parameters. Methods allow you to draw the frustum either *from* the
 * frustum as from a different point of view, in order to *see* the frustum.
 *
 */
class DefaultPluginData: public ProjectorData
{

public:


    /**
     * Default constructor fot the DefaultPluginData.
     *
     */
    DefaultPluginData (ProjectorInterface* plugin, float fov=30.f, float aspectRatio=4.f/3.f, float near=0.1f, float far=100.f, float offaxisX=0.f, float offaxisY=0.f);


    /**
     * Copy constructor fot the DefaultPluginData.
     *
     */
    DefaultPluginData (const DefaultPluginData& data): ProjectorData(data) {copy_from(data);}


    /**
     * Destructor fot the DefaultPluginData.
     *
     */
    ~DefaultPluginData ();


    /**
     * Implements the copy from other datas.
     *
     * This method is used by the copy constructor.
     *
     * @param data The source data.
     *
     * @return true if the copy is ok, false otherwise. The copy can fail if
     *         ProjectorData is not a DefaultPluginData.
     *
     * @seealso is_equal_to
     *
     */
    bool copy_from(const ProjectorData& data);


    /**
     * Implements the egality-test with other datas.
     *
     * This could be an operator==.
     *
     * @param data The data to test with.
     *
     * @return true if the data are equal, false otherwise. The test can fail if
     *         the data have different parameters, but also it ProjectorData is
     *         not a DefaultPluginData.
     *
     * @seealso copy_from
     *
     */
    bool is_equal_to(const ProjectorData& data) const;


    /**
     * Draws the frustum (a truncated pyramid).
     *
     * This method draws the frustum from outside. If the frustum is selected,
     * the lines are a little bigger.
     *
     * @param bSelected true if the frustum is selected.
     *
     */
    void draw(bool bSelected);


    /**
     * Begins the draw through the frustum.
     *
     * The draw must end with a endDraw().
     *
     * This is the same than glFrustum(), with some glPush...() before.
     *
     * @seealso endDraw
     *
     */
    void beginDraw(void);


    /**
     * Ends the draw through the frustum.
     *
     * Must be used each time a draw through the projector has begun with a
     * beginDraw().
     *
     * This is the same than some glPop...().
     *
     * @seealso beginDraw
     *
     */
    void endDraw(void);


    /**
     * Begins the projection.
     *
     * The projection must end with a endProjection().
     *
     * This is the same than glFrustum(), without anything else.
     * beginDraw and beginProjection are quite close and it is perhaps to merge
     * them, but for the moment, to respect the Projection Designer
     * implementation, it will be let like this.
     *
     * endProjection is not implemented here because it does nothing more than
     * the ProjectorData::endProjection().
     *
     */
    void beginProjection(void);


    /**
     * Sets the field of view.
     *
     * @param fov The new field of view.
     *
     */
    void setFov(float fov) {m_fov=fov;}


    /**
     * Gets the field of view.
     *
     * @return The field of view of the projector.
     *
     */
    float fov() const {return m_fov;}


    /**
     * Sets the aspect ratio.
     *
     * @param aspectRatio The new aspect ratio.
     *
     */
    void setAspectRatio(float aspectRatio) {m_aspectRatio=aspectRatio;}


    /**
     * Gets the aspect ratio.
     *
     * @return The aspect ratio of the projector.
     *
     */
    float aspectRatio() const {return m_aspectRatio;}


    /**
     * Sets the near distance of the frustum.
     *
     * @param nearDist The new near distance of the frustum.
     *
     */
    void setNearDist(float nearDist) {m_nearDist=nearDist;}


    /**
     * Gets the near distance of the frustum.
     *
     * @return The near distance of the frustum.
     *
     */
    float nearDist() const {return m_nearDist;}


    /**
     * Sets the far distance of the frustum.
     *
     * @param farDist The new far distance of the frustum.
     *
     */
    void setFarDist(float farDist) {m_farDist=farDist;}


    /**
     * Gets the far distance of the frustum.
     *
     * @return The far distance of the frustum.
     *
     */
    float farDist() const {return m_farDist;}


    /**
     * Sets the off-axis X of the frustum.
     *
     * @param offaxisX The new off-axis X of the frustum.
     *
     */
    void setOffaxisX(float offaxisX) {m_offaxisX=offaxisX;}


    /**
     * Gets the off-axis X of the frustum.
     *
     * @return The off-axis X of the frustum.
     *
     */
    float offaxisX() const {return m_offaxisX;}


    /**
     * Sets the off-axis Y of the frustum.
     *
     * @param offaxisY The new off-axis Y of the frustum.
     *
     */
    void setOffaxisY(float offaxisY) {m_offaxisY=offaxisY;}


    /**
     * Gets the off-axis Y of the frustum.
     *
     * @return The off-axis Y of the frustum.
     *
     */
    float offaxisY() const {return m_offaxisY;}


    /**
     * Sets the visible distance of the frustum.
     *
     * @param visibleFar The new visible distance of the frustum.
     *
     */
    void setVisibleFar(float visibleFar) {m_visibleFar=visibleFar;}


    /**
     * Gets the visible distance of the frustum.
     *
     * @return The visible distance of the frustum.
     *
     */
    float visibleFar() const {return m_visibleFar;}


    /**
     * Loads the frustum from a QDomElement.
     *
     * @param element The QDomElement to read from.
     *
     */
    void initFromDOMElement(const QDomElement& element);


    /**
     * Writes the frustum in a QDomDocument.
     *
     * @param name The name of the element.
     * @param doc The document whom belongs the element.
     *
     * @return The QDomElement to add.
     *
     */
    QDomElement domElement(const QString& name, QDomDocument& doc) const;


    /**
     * Gets the name of projector type, stored in g_projector_name.
     *
     * @return The name of projector type, stored in g_projector_name.
     *
     */
    const QString& projector(void) const {return g_projector_name;}


    /// Public static const projector name.
    static const QString g_projector_name;


private:


    /// Field of view of the frustum.
    float m_fov;


    /// Aspect ratio of the frustum.
    float m_aspectRatio;


    /// Near distance of the frustum.
    float m_nearDist;


    /// Far distance of the frustum.
    float m_farDist;


    /// Off-axis X of the frustum.
    float m_offaxisX;


    /// Off-axis Y of the frustum.
    float m_offaxisY;


    /// Visible far of the frustum.
    float m_visibleFar;

};

#endif // __DEFAULT_PROJECTOR_DATA_H__