source: GTP/trunk/App/Demos/Illum/pathmap/TexturedMaterial.cpp @ 2304

#include "dxstdafx.h"
#include "texturedmaterial.h"

TexturedMaterial::TexturedMaterial(void* pdata, int pitch, int textureWidth, int textureHeight)
:Material(Vector::RGBLIGHTYELLOW, Vector::RGBLIGHTYELLOW, 4.0)
{
        this->pdata = new unsigned char[pitch * textureHeight];
        memcpy(this->pdata, pdata, pitch * textureHeight);
        this->pitch = pitch;
        this->imageWidth = textureWidth;
        this->imageHeight = textureHeight;
}

TexturedMaterial::~TexturedMaterial(void)
{
        delete pdata;
}

Vector TexturedMaterial::getTextureDiffuseBrdf(const Vector& atPoint) const
{
        Vector qp = atPoint;
        qp.x -= floor(qp.x);
        qp.y -= floor(qp.y);
        unsigned int dataIndex = floor(fabsf(qp.x) * imageWidth) * 4 +
                floor(fabsf(1.0 - fabsf(qp.y)) * imageHeight) * pitch;
        if(dataIndex >= pitch * imageHeight)
                return Vector::RGBBLACK;
        return Vector(
                pdata[dataIndex+2] / 255.0,
                pdata[dataIndex+1] / 255.0,
                pdata[dataIndex] / 255.0);
}

Vector TexturedMaterial::getTextureIdealBrdf(const Vector& atPoint) const
{
        return Vector::RGBBLACK;
}

float TexturedMaterial::getTextureDiffuseAlbedo(const Vector& uv) const
{
        return getTextureDiffuseBrdf(uv).sum() / 3.0;
}

float TexturedMaterial::getTextureIdealAlbedo(const Vector& uv) const
{
        return getTextureIdealBrdf(uv).sum() / 3.0;
}