reactphysics3d/testbed/common/VisualContactPoint.h

/********************************************************************************
* ReactPhysics3D physics library, http://www.reactphysics3d.com                 *
* Copyright (c) 2010-2016 Daniel Chappuis                                       *
*********************************************************************************
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*    misrepresented as being the original software.                             *
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#ifndef VISUAL_CONTACT_POINT_H
#define VISUAL_CONTACT_POINT_H

// Libraries
#include "openglframework.h"
#include "Line.h"

const float VISUAL_CONTACT_POINT_RADIUS = 0.2f;

// Class VisualContactPoint
class VisualContactPoint : public openglframework::Object3D {

    private :

        // -------------------- Attributes -------------------- //

        /// Total number of existing contact points (static attribute)
        static int mNbTotalPoints;

        /// Sphere mesh for the visual contact point
        static openglframework::Mesh mMesh;

        /// Vertex Buffer Object for the vertices data
        static openglframework::VertexBufferObject mVBOVertices;

        /// Vertex Buffer Object for the normals data
        static openglframework::VertexBufferObject mVBONormals;

        /// Vertex Buffer Object for the indices
        static openglframework::VertexBufferObject mVBOIndices;

        /// Vertex Array Object for the vertex data
        static openglframework::VertexArrayObject mVAO;

		/// Vertex Buffer Object for the vertices data
		openglframework::VertexBufferObject mVBOVerticesNormalLine;

		/// Vertex Array Object for the vertex data
		openglframework::VertexArrayObject mVAONormalLine;

        /// True if static data (VBO, VAO) has been created already
        static bool mStaticDataCreated;

		// Two end-points of the contact normal line
		openglframework::Vector3 mContactNormalLinePoints[2];

        /// Color
        openglframework::Color mColor;

        // Create the Vertex Buffer Objects used to render the contact point sphere with OpenGL.
        static void createVBOAndVAO();

		// Create the Vertex Buffer Objects used to render the contact normal line with OpenGL.
		void createContactNormalLineVBOAndVAO();

		/// Render the contact normal line
		void renderContactNormalLine(openglframework::Shader& shader, const openglframework::Matrix4& worldToCameraMatrix);

        // -------------------- Methods -------------------- //

    public :

        // -------------------- Methods -------------------- //

        /// Constructor
        VisualContactPoint(const openglframework::Vector3& position, const std::string &meshFolderPath,
						   const openglframework::Vector3& normalLineEndPointLocal, const openglframework::Color& color);

        /// Destructor
        ~VisualContactPoint();

        /// Load and initialize the mesh for all the contact points
        static void createStaticData(const std::string& meshFolderPath);

        /// Destroy the mesh for the contact points
        static void destroyStaticData();

        /// Render the sphere contact point at the correct position and with the correct orientation
        void render(openglframework::Shader& shader,
                    const openglframework::Matrix4& worldToCameraMatrix);
};

#endif