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56 lines
1.1 KiB
C++
56 lines
1.1 KiB
C++
#include "GuiParticle.h"
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#include "platform/stubs.h"
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#include "java/Random.h"
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#include "java/Color.h"
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Random* GuiParticle::random = new Random();
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GuiParticle::GuiParticle(double x, double y, double xa, double ya) {
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// 4J - added initialisation block
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removed = false;
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life = 0;
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a = 1;
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oR = oG = oB = oA = 0;
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this->xo = this->x = x;
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this->yo = this->y = y;
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this->xa = xa;
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this->ya = ya;
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int col = Color::getHSBColor(random->nextFloat(), 0.5f, 1).getRGB();
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r = ((col >> 16) & 0xff) / 255.0;
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g = ((col >> 8) & 0xff) / 255.0;
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b = ((col) & 0xff) / 255.0;
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friction = 1.0 / (random->nextDouble() * 0.05 + 1.01);
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lifeTime = (int)(10.0 / (random->nextDouble() * 2 + 0.1));
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}
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void GuiParticle::tick(GuiParticles* guiParticles) {
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x += xa;
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y += ya;
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xa *= friction;
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ya *= friction;
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ya += 0.1;
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if (++life > lifeTime) remove();
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a = 2 - (life / (double)lifeTime) * 2;
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if (a > 1) a = 1;
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a = a * a;
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a *= 0.5;
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}
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void GuiParticle::preTick() {
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oR = r;
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oG = g;
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oB = b;
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oA = a;
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xo = x;
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yo = y;
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}
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void GuiParticle::remove() { removed = true; } |