73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
#include "particles.h"
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#include <azur/azur.h>
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#include <azur/gint/render.h>
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#include <cstdint>
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#include <stdlib.h>
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#include <num/num.h>
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extern bopti_image_t img_fill_circ;
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Particle::Particle( uint16_t lx, uint16_t ly )
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{
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x = libnum::num( lx );
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y = libnum::num( ly );
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sx = (libnum::num( rand() % 11 - 5 )) / 4 ;
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sy = (libnum::num( rand() % 11 - 5 )) / 4;
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age = libnum::num( rand() % 3 );
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maxage = libnum::num( 20 + ( rand() % 20 ) );
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size = libnum::num( 3 + ( rand() % 5 ) );
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toberemoved = false;
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}
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Particle::~Particle()
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{
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}
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void Particle::Update( float dt )
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{
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libnum::num a = libnum::num( dt / 12000.0f );
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x += sx * a;
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y += sy * a;
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age += libnum::num( dt / 12000.0f );
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sx *= libnum::num( 0.90 );
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sy *= libnum::num( 0.90 );
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if( age > maxage ) size *= libnum::num( 0.85 );
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if( size < libnum::num( 1.0f ) ) toberemoved = true;
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}
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void Particle::Render( )
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{
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uint8_t dximg = (int) ( size - libnum::num( 1 ) ) * 15;
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uint8_t sz = (int) size;
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uint16_t px = (int) x;
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uint16_t py = (int) y;
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int color;
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if ( age > 30 ) color = 0x526A; // Dark Purple Gray-ish
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else if ( age > 25 ) color = 0x71D6; // Red Brown -ish
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else if ( age > 20 ) color = 0xF80D; // Dark Red
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else if ( age > 15 ) color = 0xFB80; // Red
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else if ( age > 10 ) color = 0xFFE0; // Yellow
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else color = 0xFFFF; // White
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azrp_subimage_p8_dye( px-7, py-7,
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&img_fill_circ,
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dximg+7-sz, 7-sz, sz*2, sz*2,
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IMAGE_DYE, color );
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}
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