Tube.cpp

Go to the documentation of this file.

#include "Tube.h"

Tube::Tube(int resolution, float radius, float height, float innerRadius) {
        m_pTubeVertices = NULL;

        if (innerRadius == 0.0f) {
                if (!createFlatTube(resolution, radius, height)) {
                        if (m_pTubeVertices) delete []m_pTubeVertices;
                        m_pTubeVertices = NULL;
                        LOG_ERROR(("Unable to load object tube"));
                        return;
                }
        }


        LOG_SUCCESS(("Object tube loaded"));
}

bool Tube::createFlatTube(int resolution, float radius, float height) {
        float stepsize = TWOPI/(float)resolution;
        int numVertices = resolution*2+2;

        m_pTubeVertices = new Vertex[numVertices];

        int index = 0;
        float tu, tv;
        float nx, ny, nz;
        float vx, vy, vz;

        float halfHeight = height/2.0f;

        tu = tv = nx = ny = nz = vx = vy = vz = 0.0f;

        for (float i=0.0f; i<=TWOPI; i+=stepsize) {
                vx = sinf(i)*radius;
                vz = cosf(i)*radius;
                vy = -halfHeight;

                tu = (1.0f/resolution)*(float)index;
                tv = 0.0f;

                setVertData(index, tu, tv, nx, ny, nz, vx, vy, vz);

                vy = halfHeight;
                tv = 1.0f;
                setVertData(index+1, tu, tv, nx, ny, nz, vx, vy, vz);

                index += 2;
        }

        addFormat(ATT_VERTEX, ATT_FLOAT, 3, sizeof(float)*5);
        addFormat(ATT_NORMAL, ATT_FLOAT, 3, sizeof(float)*2);
        addFormat(ATT_TEX, ATT_FLOAT, 2, 0);
        setPrimitive(PRIM_TRIANGLE_STRIP);
        setVertices(m_pTubeVertices, numVertices, sizeof(Vertex));

        return true;
}

void Tube::setVertData(int index, float tu, float tv, 
                                                float nx, float ny, float nz, 
                                                float vx, float vy, float vz)
{
        (m_pTubeVertices+index)->tu = tu;
        (m_pTubeVertices+index)->tv = tv;
        (m_pTubeVertices+index)->nx = nx;
        (m_pTubeVertices+index)->ny = ny;
        (m_pTubeVertices+index)->nz = nz;
        (m_pTubeVertices+index)->vx = vx;
        (m_pTubeVertices+index)->vy = vy;
        (m_pTubeVertices+index)->vz = vz;
}

Tube::~Tube() {
        m_pTubeVertices = NULL;         // deletion handled by Object.cpp
}

---