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- #ifndef TRANSITION_SQUARES_H__
- #define TRANSITION_SQUARES_H__
-
- #include <Arduino.h>
- #include "ILI9341_t3.h"
- #include "MathUtil.h"
- #include "BaseTransition.h"
-
-
- const float TRANSITION_SQUARES_SPEED = 0.06f;
- const float TRANSITION_SQUARES_SLOPE = 0.08f;
- const uint_fast8_t TRANSITION_SQ_SIZE = 30; // multiple of 2, please
-
-
- class TransitionSquares : public BaseTransition {
- public:
- TransitionSquares() : BaseTransition() {};
-
- void init( ILI9341_t3 tft );
- void restart( ILI9341_t3 tft, uint_fast16_t color );
- void perFrame( ILI9341_t3 tft, FrameParams frameParams );
- boolean isComplete();
-
- private:
- float _phase = 0;
- uint_fast16_t _color;
- boolean _isComplete = false;
- };
-
- void TransitionSquares::init( ILI9341_t3 tft ) {
-
- }
-
- void TransitionSquares::restart( ILI9341_t3 tft, uint_fast16_t inColor ) {
- //uint_fast16_t w = tft.width();
- //uint_fast16_t h = tft.height();
- _phase = 0;
- _color = inColor;
- _isComplete = false;
- }
-
- float easeInOutSine( float p ) {
- if( p < 0.5f ) return (1.0f - cos( p * M_PI )) * 0.5f;
- return 0.5f + ( sin( ( p - 0.5f ) * M_PI ) * 0.5f );
- }
-
- void TransitionSquares::perFrame( ILI9341_t3 tft, FrameParams frameParams ) {
- uint_fast16_t w = (uint_fast16_t)tft.width();
- uint_fast16_t h = (uint_fast16_t)tft.height();
-
- float prevPhase = _phase;
- _phase += frameParams.timeMult * TRANSITION_SQUARES_SPEED;
-
- boolean anySmallSquares = false;
-
- // Draw squares, offset so squares grow out from center
- uint_fast8_t across = w / TRANSITION_SQ_SIZE + 1;
- uint_fast8_t down = h / TRANSITION_SQ_SIZE + 1;
- for( uint_fast8_t i=0; i<across; i++ ) {
- for( uint_fast8_t j=0; j<down; j++ ) {
-
- uint_fast8_t prevSize = TRANSITION_SQ_SIZE * easeInOutSine( constrain( prevPhase - (i+j)*TRANSITION_SQUARES_SLOPE, 0.0f, 1.0f ) );
- prevSize = (prevSize>>1) << 1; // Round down to even number
-
- uint_fast8_t size = TRANSITION_SQ_SIZE * easeInOutSine( constrain( _phase - (i+j)*TRANSITION_SQUARES_SLOPE, 0.0f, 1.0f ) );
- size = (size>>1) << 1; // Round down to even number
- if( size < TRANSITION_SQ_SIZE ) anySmallSquares = true;
-
- // Squares should grow out from center.
- // Draw hollow squares, so we only redraw pixels that change.
- for( uint_fast8_t s=prevSize+2; s<=size; s+=2 ) {
- tft.drawRect( (i+0.5f)*TRANSITION_SQ_SIZE - (s>>1), (j+0.5f)*TRANSITION_SQ_SIZE - (s>>1), s, s, _color );
- }
-
- //tft.fillRect( (i+0.5f)*TRANSITION_SQ_SIZE - (size>>1), (j+0.5f)*TRANSITION_SQ_SIZE - (size>>1), size, size, _color );
- }
- }
-
- // When all squares are full-size, the transition is done!
- _isComplete = !anySmallSquares;
- }
-
- boolean TransitionSquares::isComplete() {
- return _isComplete;
- }
-
- #endif
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