ComputerGrafik/LinePlaneModel.cpp at master · luguenth/ComputerGrafik · GitHub

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//
//  LineGridModel.cpp
//  ogl4
//
//  Created by Philipp Lensing on 19.09.16.
//  Copyright © 2016 Philipp Lensing. All rights reserved.
//

#include "LinePlaneModel.h"

LinePlaneModel::LinePlaneModel( float DimX, float DimZ, int NumSegX, int NumSegZ )
{
    VB.begin();

    float StepX = DimX / (float)NumSegX;
    float StepZ = DimZ / (float)NumSegZ;

    float BeginX = -DimZ/2.0f;
    float BeginZ = -DimX/2.0f;

    for( int i=0; i<=NumSegX; ++i )
    {
        VB.addVertex( BeginZ + i*StepX, 0, BeginX );
        VB.addVertex( BeginZ + i*StepX, 0, -BeginX );
    }
    for( int i=0; i<=NumSegZ; ++i )
    {
        VB.addVertex( BeginZ, 0, BeginX + i*StepZ );
        VB.addVertex( -BeginZ, 0, BeginX + i*StepZ );
    }

    VB.end();

}

void LinePlaneModel::draw(const BaseCamera& Cam)
{
    BaseModel::draw(Cam);

    VB.activate();

    glDrawArrays(GL_LINES, 0, VB.vertexCount());

    VB.deactivate();
}