#include <math.h></math.h>

#include <helianthus.h></helianthus.h>

#include "sprites.h"

static Group pulse;

void spritesInit() {

	pulse = createGroup();

	Sprite s;

	double x = 1024 - 6*64 + 48/2;

	double y = 16 + 48/2;

	// normal

	s = createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks.png"));

	groupAdd(pulse, s);

	x += 64;

	// indexed colors

	s = createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/snail-indexed.png"));

	groupAdd(pulse, s);

	x += 64;

	// without alpha

	s = createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	groupAdd(pulse, s);

	x += 64;

	// without texture

	s = createSprite(x, y, 48, 48);

	spriteSetShapeColor(s, colorByName("blue"));

	groupAdd(pulse, s);

	x += 64;

	// with tint color

	s = createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks.png"));

	spriteSetTintColor(s, colorByName("red"));

	groupAdd(pulse, s);

	x += 64;

	// semi-transparent

	s = createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks.png"));

	spriteSetTintColor(s, colorByRGBA(1, 1, 1, 0.5));

	groupAdd(pulse, s);

	x += 64;

	x = 1024 - 16 - 48/2;

	y += 64;

	// tiles

	s = createSpriteEx(x - 48/2, y + 48/2, 48, 48, createAnimation("data/sprite/bricks.png"));

	groupAdd(pulse, s);

	createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	createSpriteEx(x, y + 48, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	x -= 48;

	createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	createSpriteEx(x, y + 48, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	x -= 64;

	// blend two sprites

	s = createSpriteEx(x, y, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	spriteSetTintColor(s, colorByRGBA(1, 1, 1, 0.5));

	groupAdd(pulse, s);

	x -= 16;

	s = createSpriteEx(x, y + 16, 48, 48, createAnimation("data/sprite/bricks-tile.png"));

	spriteSetTintColor(s, colorByRGBA(1, 1, 1, 0.5));

	groupAdd(pulse, s);

	x -= 64;

	// texture size is not power of two

	double k = 0.25, w = 343*k, h = 221*k;

	x += 48/2 - w/2;

	s = createSpriteEx(x, y, w, h, createAnimation("data/sprite/snake.png"));

	spriteSetDebug(s, TRUE);

	groupAdd(pulse, s);

}

void spritesDraw() {

	const double shift = PI/4;

	const double scalePeriod = 1;

	const double scaleAmplitude = 0.1;

	const double rotatePeriod = 2;

	const double rotateAmplitude = 30;

	double time = windowGetSeconds();

	for(int i = 0; i < groupGetCount(pulse); ++i) {

		double scale = exp( scaleAmplitude * sin(shift*i + time/scalePeriod*2*PI) );

		double rotation = rotateAmplitude * sin(shift*i + time/rotatePeriod*2*PI);

		Sprite s = groupGet(pulse, i);

		spriteSetScale(s, scale);

		spriteSetRotation(s, rotation);

	}

}