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#include "GameObject.h"
#include "common.h"
void GameObject::shiftBetweenPages( int inPageA, int inPageB,
int inNumSteps ) {
mShiftingPages = true;
mShiftPageA = inPageA;
mShiftPageB = inPageB;
mNumShiftSteps = inNumSteps;
mNumShiftStepsDone = 0;
}
void GameObject::draw( double inRotation, Vector3D *inPosition,
double inScale,
double inFadeFactor,
Color *inColor ) {
if( mSprite == NULL ) {
return;
}
if( !mShiftingPages ) {
mSprite->draw( mSpriteFrame, inRotation, inPosition,
inScale, inFadeFactor, inColor );
}
else {
int oldPage = mSprite->getPage();
double bBlend = mNumShiftStepsDone / (double)mNumShiftSteps;
bBlend = smoothBlend( bBlend );
// draw A at full blend
mSprite->setPage( mShiftPageA );
mSprite->draw( mSpriteFrame, inRotation, inPosition,
inScale, inFadeFactor, inColor );
// fade B in on top
mSprite->setPage( mShiftPageB );
mSprite->draw( mSpriteFrame, inRotation, inPosition,
inScale, inFadeFactor * bBlend, inColor );
// restore page
mSprite->setPage( oldPage );
}
}
void GameObject::mainStep() {
if( mShiftingPages ) {
mNumShiftStepsDone ++;
if( mNumShiftStepsDone > mNumShiftSteps ) {
mShiftingPages = false;
}
}
// call child's step function
step();
}
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