SquareShape.h

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#ifndef ULT_SQUARE_SHAPE_H_INCLUDED
#define ULT_SQUARE_SHAPE_H_INCLUDED
 
#include <cstdio>
 
#include "../ModelData.h"
 
#define ULT_UNIT_SQUARE_VERTEX_TOTAL 4
#define ULT_UNIT_SQUARE_INDEX_TOTAL 6
#define ULT_UNIT_SQUARE_STRIDE sizeof(Ult::stUnitSquareVertex)
 
namespace Ult
{
 
struct stUnitSquareVertex
{
    float x,y,z;
    float tu1,tv1;
    float nx,ny,nz;
};

bool CreateSquareMesh(float width, float height, ModelData* model)
{
    if (!model) { return false; }
 
    stUnitSquareVertex UnitSquareData[ULT_UNIT_SQUARE_VERTEX_TOTAL] = {
        { +1*width, -1*height, 0,  1, 0,  0, 0, 1 },
        { -1*width, -1*height, 0,  0, 0,  0, 0, 1 },
        { -1*width, +1*height, 0,  0, 1,  0, 0, 1 },
        { +1*width, +1*height, 0,  1, 1,  0, 0, 1 }
    };
    unsigned int UnitSquareIndices[ULT_UNIT_SQUARE_INDEX_TOTAL] = {
        0, 1, 2,
        2, 3, 0
    };
 
    model->Clear();
    model->AddDescriptorElement(Ult::ULT_VERTEX_3F);
    model->AddDescriptorElement(Ult::ULT_TEX1_2F);
    model->AddDescriptorElement(Ult::ULT_NORMAL_3F);
 
    if (!model->SetVertices(
            Ult::ULT_TRI_LIST,
            ULT_UNIT_SQUARE_VERTEX_TOTAL,
            ULT_UNIT_SQUARE_STRIDE,
            (char*)UnitSquareData)) {
        printf("Failed to set square vertices\n");
        return false;
    }
    if (!model->SetIndices(
            ULT_UNIT_SQUARE_INDEX_TOTAL,
            UnitSquareIndices)) {
        printf("Failed to set square indices\n");
        return false;
    }
 
    return true;
}

bool CreateUnitSquareMesh(Ult::ModelData* model)
{
    return CreateSquareMesh(1, 1, model);
}
 
} // namespace Ult
 
#endif // ULT_SQUARE_SHAPE_H_INCLUDED