Someone

void Drawer::Draw(float iT)
{
    int i = 0;
    glColor3f(0.0f,0.0f,1.0f);

    static std::vector<float> grid;
    grid.resize(iScreenHeight * iScreenWidth);
    for (int i = 0; i < iScreenHeight; ++i)
        for (int j = 0; j < iScreenWidth; ++j)
            grid[i * iScreenWidth + j] = Wrangle(i*64./iScreenWidth - iOriginX, j*64./iScreenHeight - iOriginY, iT);

    static std::vector<float> vertices;
    static std::vector<float> colors;
    colors.clear();
    vertices.clear();

    while(i < iScreenHeight - 1)
    {
        float fResult[2];
        int j = 0;
        while(j < iScreenWidth) {
            fResult[0] = grid[(i + 1) * iScreenWidth + j];
            fResult[1] = grid[i * iScreenWidth + j];

            colors.push_back(0.0);
            colors.push_back(0.0);
            colors.push_back(0.75 - fResult[0]*10);
            colors.push_back(0.0);
            colors.push_back(0.0);
            colors.push_back(0.75 - fResult[1]*10);

            vertices.push_back(fMinX+(i+1)*fDistX);
            vertices.push_back(fMinY+j*fDistY);
            vertices.push_back(fResult[0]);
            vertices.push_back(fMinX+i*fDistX);
            vertices.push_back(fMinY+j*fDistY);
            vertices.push_back(fResult[1]);

            j++;
        }

        i++;
    }

    glVertexPointer(3, GL_FLOAT, 0, &vertices[0]);
    glColorPointer(3, GL_FLOAT, 0, &colors[0]);
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_COLOR_ARRAY);
    for (int i = 0; i < iScreenHeight; ++i)
        glDrawArrays(GL_TRIANGLE_STRIP, iScreenWidth*i*2, iScreenWidth*2);

    glDisableClientState(GL_VERTEX_ARRAY);
    glDisableClientState(GL_COLOR_ARRAY);
}