/*
* Copyright (c) 2003-onwards Shaven Puppy Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'Shaven Puppy' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package worm.effects;
import net.puppygames.applet.TickableObject;
import net.puppygames.applet.effects.Effect;
import worm.Layers;
import worm.entities.Saucer;
import com.shavenpuppy.jglib.interpolators.LinearInterpolator;
import com.shavenpuppy.jglib.opengl.GLRenderable;
import static org.lwjgl.opengl.GL11.*;
/**
* Special effect highlighting where a saucer has appeared
*/
public class SaucerEffect extends Effect {
public static final long serialVersionUID = 1L;
/*
* Static data
*/
/** Duration */
private static final int RES_IN_DURATION = 120;
private static final int RES_OUT_DURATION = 30;
private static final float ALPHA = 0.25f;
private static final float OUTER_ALPHA_MULT = 0.5f;
/** Size of the outer circle */
private static final float OUTER_START_SIZE = 1024.0f;
private static final float OUTER_END_SIZE = 32.0f;
private static final float INNER_SIZE = 128.0f;
/** Speed the inner circle rotates at */
private static final float INNER_ROTATION = 0.5f;
/** Speed the outer circle rotates at */
private static final float OUTER_ROTATION = -0.5f;
/** Length of crosshair lines */
private static final float LINE_LENGTH = 8.0f;
/** line widths */
private static final float LINE_WIDTH = 4.0f;
/** Length of crosshair lines on inner circle */
private static final float INNER_LINE_RADIUS = INNER_SIZE - LINE_LENGTH;
/** Tick */
private int tick;
/** Outer circle angle */
private float outerAngle;
/** Inner circle angle */
private float innerAngle;
/** The saucer we are targeting on */
private Saucer saucer;
/** Phase */
private int phase;
private static final int PHASE_RES_IN = 0;
private static final int PHASE_RES_OUT = 1;
/** Rendered by... */
private TickableObject tickableObject;
/**
* C'tor
* @param saucer
*/
public SaucerEffect(Saucer saucer) {
this.saucer = saucer;
}
/* (non-Javadoc)
* @see net.puppygames.applet.effects.Effect#doSpawn()
*/
@Override
protected void doSpawn() {
tickableObject = new TickableObject() {
@Override
public void render() {
final float x = saucer.getMapX() + saucer.getCollisionX();
final float y = saucer.getMapY() + saucer.getCollisionY();
float alpha;
float radius;
switch (phase) {
case PHASE_RES_IN:
radius = LinearInterpolator.instance.interpolate(OUTER_START_SIZE, OUTER_END_SIZE, tick / (float) RES_IN_DURATION);
alpha = LinearInterpolator.instance.interpolate(0.0f, ALPHA, tick / (float) RES_IN_DURATION);
break;
case PHASE_RES_OUT:
radius = LinearInterpolator.instance.interpolate(OUTER_END_SIZE, OUTER_START_SIZE, tick / (float) RES_OUT_DURATION);
alpha = LinearInterpolator.instance.interpolate(ALPHA, 0.0f, tick / (float) RES_OUT_DURATION);
break;
default:
assert false;
radius = 0.0f;
alpha = 0.0f;
}
float lineRadius = radius + LINE_LENGTH;
// Draw outer circle
glRender(new GLRenderable() {
@Override
public void render() {
glEnable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glLineWidth(LINE_WIDTH);
glPushMatrix();
glTranslatef(getOffset().getX() + x, getOffset().getY() + y, 0.0f);
glEnableClientState(GL_COLOR_ARRAY);
}
});
glBegin(GL_LINE_LOOP);
{
glColor4f(0.2f, 1.0f, 0.2f, alpha);
for (int i = 0; i < 32; i++) {
glVertex2f((float) Math.cos(i * Math.PI / 16.0) * radius, (float) Math.sin(i * Math.PI / 16.0) * radius);
}
}
glEnd();
// Draw crosshair lines at the edge of the circle
glRender(new GLRenderable() {
@Override
public void render() {
glRotatef(outerAngle, 0.0f, 0.0f, 1.0f);
}
});
glBegin(GL_LINES);
{
for (int i = 0; i < 32; i += 8) {
glVertex2f((float) Math.cos(i * Math.PI / 16.0) * radius, (float) Math.sin(i * Math.PI / 16.0) * radius);
glVertex2f((float) Math.cos(i * Math.PI / 16.0) * lineRadius, (float) Math.sin(i * Math.PI / 16.0) *
lineRadius);
}
}
glEnd();
glRender(new GLRenderable() {
@Override
public void render() {
glPopMatrix();
glPushMatrix();
glTranslatef(getOffset().getX() + x, getOffset().getY() + y, 0.0f);
glRotatef(innerAngle, 0.0f, 0.0f, 1.0f);
glLineStipple(1, (short) 0xF0F0);
glEnable(GL_LINE_STIPPLE);
}
});
glBegin(GL_LINE_LOOP);
{
glColor4f(0.2f, 1.0f, 0.2f, alpha*OUTER_ALPHA_MULT);
for (int i = 0; i < 32; i++) {
glVertex2f((float) Math.cos(i * Math.PI / 16.0) * INNER_SIZE, (float) Math.sin(i * Math.PI / 16.0) *
INNER_SIZE);
}
}
glEnd();
glRender(new GLRenderable() {
@Override
public void render() {
glDisable(GL_LINE_STIPPLE);
}
});
glBegin(GL_LINES);
{
for (int i = 0; i < 32; i += 4) {
glVertex2f((float) Math.cos(i * Math.PI / 16.0) * INNER_SIZE, (float) Math.sin(i * Math.PI / 16.0) *
INNER_SIZE);
glVertex2f((float) Math.cos(i * Math.PI / 16.0) * INNER_LINE_RADIUS, (float) Math.sin(i * Math.PI / 16.0) *
INNER_LINE_RADIUS);
}
}
glEnd();
glRender(new GLRenderable() {
@Override
public void render() {
glPopMatrix();
glLineWidth(1.0f);
}
});
}
};
tickableObject.spawn(getScreen());
tickableObject.setLayer(Layers.BUILDING_INFO);
}
/* (non-Javadoc)
* @see net.puppygames.applet.effects.Effect#doRemove()
*/
@Override
protected void doRemove() {
if (tickableObject != null) {
tickableObject.remove();
tickableObject = null;
}
}
/*
* (non-Javadoc)
* @see xap.resources.SpecialEffectResource.SpecialEffectInstance#doTick()
*/
@Override
protected void doTick() {
innerAngle += INNER_ROTATION;
outerAngle += OUTER_ROTATION;
switch (phase) {
case PHASE_RES_IN:
tick ++;
// If saucer is no longer shootable, res out
if (saucer.isDead() || !saucer.isActive()) {
phase = PHASE_RES_OUT;
tick = 0;
}
break;
case PHASE_RES_OUT:
tick ++;
break;
default:
assert false;
}
}
/* (non-Javadoc)
* @see net.puppygames.applet.effects.Effect#doRender()
*/
@Override
protected void doRender() {
}
/* (non-Javadoc)
* @see net.puppygames.applet.Tickable#isActive()
*/
@Override
public boolean isActive() {
return !(phase == PHASE_RES_OUT && tick == RES_OUT_DURATION);
}
}