//Adapted from BetaCairo demo : http://www.ogre3d.org/forums/viewtopic.php?t=26987 (created by betajaen)
void OgreAppLogic::updateClock2Canvas()
{
Chrono chrono(true);
time_t now = time(NULL);
struct tm * timeinfo;
timeinfo = localtime(&now);
float sec = (float) timeinfo->tm_sec;
float min = (float) timeinfo->tm_min;
float hour = (float) timeinfo->tm_hour;
float clockSize = 150.0f;
float clockUpdate = 0.125f;
Ogre::Canvas::Context* ctx = mCanvasTextureClock2->getContext();
Ogre::ColourValue tomato = Ogre::Canvas::ColourConverter::fromHexa("#ff6347");
Ogre::ColourValue whitesmoke = Ogre::Canvas::ColourConverter::fromHexa("#f5f5f5");
// Basic bits:
// Paint the Drawing with a tomatoes, this pretty much wipes over the previous drawing.
ctx->fillStyle(tomato);
ctx->fillRect(0, 0, clockSize, clockSize);
// Draw a outline around the texture, using the whitesmoke colour and a line thickness of 1 pixel
ctx->strokeStyle(whitesmoke);
ctx->lineWidth(1.0f);
ctx->strokeRect(0, 0, clockSize, clockSize);
// Path out an arc (semi or full circle)
ctx->fillStyle(whitesmoke);
ctx->arc(clockSize / 2.0f, clockSize / 2.0f, clockSize / 4.0f, 0.0f, 360.0f, false);
ctx->fill();
// The Hour hand:
ctx->lineCap(Ogre::Canvas::LineCap_Round);
ctx->strokeStyle(tomato);
ctx->lineWidth(3.0f);
ctx->moveTo(clockSize / 2.0f, clockSize / 2.0f); // Move to the center of the image
// Using a simple bit of trig. path the hour hand from the center to the correct hour, using a length of 1/5th of the imagesize.
ctx->lineTo((clockSize / 2.0f) + (Ogre::Math::Sin(hour * Ogre::Math::PI / 6.0f) * (clockSize / 5.0f)), (clockSize / 2.0f) + (-Ogre::Math::Cos(hour * Ogre::Math::PI / 6.0f) * (clockSize / 5.0f)));
ctx->stroke();
// The Minute hand:
ctx->beginPath();
ctx->moveTo(clockSize / 2.0f, clockSize / 2.0f); // Move to the center of the image
// Now draw the hour hand, using a length of 1/6th of the imagesize.
ctx->lineTo((clockSize / 2) + (Ogre::Math::Sin((min + (sec / 60.0f)) * Ogre::Math::PI / 30.0f) * (clockSize / 6.0f)), (clockSize / 2) + (-Ogre::Math::Cos((min + (sec / 60.0f)) * Ogre::Math::PI / 30.0f) * (clockSize / 6.0f)));
ctx->stroke();
ctx->lineWidth(2.0f);
ctx->strokeStyle(whitesmoke);
ctx->stroke();
// The second hand, and previous seconds:
ctx->lineWidth(1.5f);
Ogre::ColourValue c = whitesmoke;
int lastSecond = (int) Ogre::Math::Ceil(sec);
float a = 1.0f / sec;
// For each previous second, draw it out, with a subtle fade (alpha). The alpha decreases based how close it is to the current second.
for (int i=0; i<lastSecond; i++)
{
ctx->strokeStyle(Ogre::ColourValue(c.r, c.g, c.b, a*i));
ctx->moveTo((clockSize / 2) + (Ogre::Math::Sin(i * Ogre::Math::PI / 30.0f) * (clockSize / 4.0f) ), (clockSize / 2.0f) + (-Ogre::Math::Cos(i * Ogre::Math::PI / 30.0f) * (clockSize / 4.0f)));
ctx->lineTo((clockSize / 2) + (Ogre::Math::Sin(i * Ogre::Math::PI / 30.0f) * (clockSize / 3.5f) ) , (clockSize / 2.0f) + (-Ogre::Math::Cos(i * Ogre::Math::PI / 30.0f) * (clockSize / 3.5f)));
ctx->stroke();
}
// Draw the main second.
ctx->strokeStyle(whitesmoke);
ctx->moveTo((clockSize / 2.0f) + (Ogre::Math::Sin(sec * Ogre::Math::PI / 30.0f) * (clockSize / 4.0f) ), (clockSize / 2.0f) + (-Ogre::Math::Cos(sec * Ogre::Math::PI / 30.0f) * (clockSize / 4.0f)));
ctx->lineTo((clockSize / 2.0f) + (Ogre::Math::Sin(sec * Ogre::Math::PI / 30.0f) * (clockSize / 3.5f) ) , (clockSize / 2.0f) + (-Ogre::Math::Cos(sec * Ogre::Math::PI / 30.0f) * (clockSize / 3.5f)));
ctx->stroke();
// Outer ring:
ctx->strokeStyle(whitesmoke);
ctx->arc((clockSize / 2.0f),(clockSize / 2.0f), (clockSize / 3.5f), 0.0f, 360.0f, false); // Path out an arc, from the center, for a radius of 1/3.5th of the image
ctx->stroke();
// The 12:
// Path and Stroke "12"
ctx->fillText("12", (clockSize / 2.0f)-8, (clockSize / 5.0f));
double renderTime = chrono.getTimeElapsed();
mCanvasTextureClock2->uploadTexture();
double uploadTime = chrono.getTimeElapsed()-renderTime;
std::cout << "clock2 render: " << renderTime << "ms, upload: " << uploadTime << "ms" <<std::endl;
}
