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WiggleEffect.hx
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WiggleEffect.hx
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package;
// STOLEN FROM HAXEFLIXEL DEMO LOL
import flixel.system.FlxAssets.FlxShader;
enum WiggleEffectType
{
DREAMY;
WAVY;
HEAT_WAVE_HORIZONTAL;
HEAT_WAVE_VERTICAL;
FLAG;
}
class WiggleEffect
{
public var shader(default, null):WiggleShader = new WiggleShader();
public var effectType(default, set):WiggleEffectType = DREAMY;
public var waveSpeed(default, set):Float = 0;
public var waveFrequency(default, set):Float = 0;
public var waveAmplitude(default, set):Float = 0;
public function new():Void
{
shader.uTime.value = [0];
}
public function update(elapsed:Float):Void
{
shader.uTime.value[0] += elapsed;
}
public function setValue(value:Float):Void
{
shader.uTime.value[0] = value;
}
function set_effectType(v:WiggleEffectType):WiggleEffectType
{
effectType = v;
shader.effectType.value = [WiggleEffectType.getConstructors().indexOf(Std.string(v))];
return v;
}
function set_waveSpeed(v:Float):Float
{
waveSpeed = v;
shader.uSpeed.value = [waveSpeed];
return v;
}
function set_waveFrequency(v:Float):Float
{
waveFrequency = v;
shader.uFrequency.value = [waveFrequency];
return v;
}
function set_waveAmplitude(v:Float):Float
{
waveAmplitude = v;
shader.uWaveAmplitude.value = [waveAmplitude];
return v;
}
}
class WiggleShader extends FlxShader
{
@:glFragmentSource('
#pragma header
//uniform float tx, ty; // x,y waves phase
uniform float uTime;
const int EFFECT_TYPE_DREAMY = 0;
const int EFFECT_TYPE_WAVY = 1;
const int EFFECT_TYPE_HEAT_WAVE_HORIZONTAL = 2;
const int EFFECT_TYPE_HEAT_WAVE_VERTICAL = 3;
const int EFFECT_TYPE_FLAG = 4;
uniform int effectType;
/**
* How fast the waves move over time
*/
uniform float uSpeed;
/**
* Number of waves over time
*/
uniform float uFrequency;
/**
* How much the pixels are going to stretch over the waves
*/
uniform float uWaveAmplitude;
vec2 sineWave(vec2 pt)
{
float x = 0.0;
float y = 0.0;
if (effectType == EFFECT_TYPE_DREAMY)
{
float offsetX = sin(pt.y * uFrequency + uTime * uSpeed) * uWaveAmplitude;
pt.x += offsetX; // * (pt.y - 1.0); // <- Uncomment to stop bottom part of the screen from moving
}
else if (effectType == EFFECT_TYPE_WAVY)
{
float offsetY = sin(pt.x * uFrequency + uTime * uSpeed) * uWaveAmplitude;
pt.y += offsetY; // * (pt.y - 1.0); // <- Uncomment to stop bottom part of the screen from moving
}
else if (effectType == EFFECT_TYPE_HEAT_WAVE_HORIZONTAL)
{
x = sin(pt.x * uFrequency + uTime * uSpeed) * uWaveAmplitude;
}
else if (effectType == EFFECT_TYPE_HEAT_WAVE_VERTICAL)
{
y = sin(pt.y * uFrequency + uTime * uSpeed) * uWaveAmplitude;
}
else if (effectType == EFFECT_TYPE_FLAG)
{
y = sin(pt.y * uFrequency + 10.0 * pt.x + uTime * uSpeed) * uWaveAmplitude;
x = sin(pt.x * uFrequency + 5.0 * pt.y + uTime * uSpeed) * uWaveAmplitude;
}
return vec2(pt.x + x, pt.y + y);
}
void main()
{
vec2 uv = sineWave(openfl_TextureCoordv);
gl_FragColor = texture2D(bitmap, uv);
}')
public function new()
{
super();
}
}