bool Scene::Process3DTap(int action, const grinliz::Vector2F& view, const grinliz::Ray& world, Engine* engine)
{
Ray ray;
bool result = false;
switch( action )
{
case GAME_PAN_START:
{
game->GetScreenport().ViewProjectionInverse3D( &dragData3D.mvpi );
engine->RayFromViewToYPlane( view, dragData3D.mvpi, &ray, &dragData3D.start3D );
dragData3D.startCameraWC = engine->camera.PosWC();
dragData3D.end3D = dragData3D.start3D;
dragData3D.start2D = dragData3D.end2D = view;
threeDTapDown = true;
break;
}
case GAME_PAN_MOVE:
case GAME_PAN_END:
{
// Not sure how this happens. Why is the check for down needed??
if( threeDTapDown ) {
Vector3F drag;
engine->RayFromViewToYPlane( view, dragData3D.mvpi, &ray, &drag );
dragData3D.end2D = view;
Vector3F delta = drag - dragData3D.start3D;
GLASSERT( fabsf( delta.x ) < 1000.f && fabsf( delta.y ) < 1000.0f );
delta.y = 0;
drag.y = 0;
dragData3D.end3D = drag;
if ( action == GAME_TAP_UP ) {
threeDTapDown = false;
Vector2F vDelta = dragData3D.start2D - dragData3D.end2D;
if ( vDelta.Length() < 10.f )
result = true;
}
engine->camera.SetPosWC(dragData3D.startCameraWC - delta);
}
break;
}
}
return result;
}
//----------------------------------------------------------------------------
Texture2D* Sample5::CreateTexture()
{
if (mspTexture)
{
return mspTexture;
}
// define the properties of the image to be used as a texture
const UInt width = 256;
const UInt height = 256;
const Image2D::FormatMode format = Image2D::FM_RGB888;
const UInt bpp = Image2D::GetBytesPerPixel(format);
ColorRGB* const pColorDst = WIRE_NEW ColorRGB[width*height];
// create points with random x,y position and color
TArray<Cell> cells;
Random random;
for (UInt i = 0; i < 10; i++)
{
Cell cell;
cell.point.X() = random.GetFloat() * width;
cell.point.Y() = random.GetFloat() * height;
cell.color.R() = random.GetFloat();
cell.color.G() = random.GetFloat();
cell.color.B() = random.GetFloat();
Float max = 0.0F;
max = max < cell.color.R() ? cell.color.R() : max;
max = max < cell.color.G() ? cell.color.G() : max;
max = max < cell.color.B() ? cell.color.B() : max;
max = 1.0F / max;
cell.color *= max;
cells.Append(cell);
}
// iterate over all texels and use the distance to the 2 closest random
// points to calculate the texel's color
Float max = 0;
for (UInt y = 0; y < height; y++)
{
for (UInt x = 0; x < width; x++)
{
Float minDist = MathF::MAX_REAL;
Float min2Dist = MathF::MAX_REAL;
UInt minIndex = 0;
for (UInt i = 0; i < cells.GetQuantity(); i++)
{
Vector2F pos(static_cast<Float>(x), static_cast<Float>(y));
// Handle tiling
Vector2F vec = cells[i].point - pos;
vec.X() = MathF::FAbs(vec.X());
vec.Y() = MathF::FAbs(vec.Y());
vec.X() = vec.X() > width/2 ? width-vec.X() : vec.X();
vec.Y() = vec.Y() > height/2 ? height-vec.Y() : vec.Y();
Float distance = vec.Length();
if (minDist > distance)
{
min2Dist = minDist;
minDist = distance;
minIndex = i;
}
else if (min2Dist > distance)
{
min2Dist = distance;
}
}
Float factor = (min2Dist - minDist) + 3;
ColorRGB color = cells[minIndex].color * factor;
pColorDst[y*width+x] = color;
max = max < color.R() ? color.R() : max;
max = max < color.G() ? color.G() : max;
max = max < color.B() ? color.B() : max;
}
}
// convert and normalize the ColorRGBA float array to an 8-bit per
// channel texture
max = 255.0F / max;
UChar* const pDst = WIRE_NEW UChar[width * height * bpp];
for (UInt i = 0; i < width*height; i++)
{
ColorRGB color = pColorDst[i];
pDst[i*bpp] = static_cast<UChar>(color.R() * max);
pDst[i*bpp+1] = static_cast<UChar>(color.G() * max);
pDst[i*bpp+2] = static_cast<UChar>(color.B() * max);
}
Image2D* pImage = WIRE_NEW Image2D(format, width, height, pDst);
Texture2D* pTexture = WIRE_NEW Texture2D(pImage);
// The texture tiles are supposed to be seamless, therefore
// we need the UV set to be repeating.
pTexture->SetWrapType(0, Texture2D::WT_REPEAT);
pTexture->SetWrapType(1, Texture2D::WT_REPEAT);
// save the texture for later reference
mspTexture = pTexture;
return pTexture;
}