From 2c1c5595efec1db63c142accda59e83079af217e Mon Sep 17 00:00:00 2001 From: "milo24x7@gmail.com" Date: Sun, 7 Jul 2013 21:26:31 +0000 Subject: Updated open source license declaration and fixed some formatting issues. --- nGenEx/Particles.cpp | 552 +++++++++++++++++++++++++++------------------------ 1 file changed, 288 insertions(+), 264 deletions(-) (limited to 'nGenEx/Particles.cpp') diff --git a/nGenEx/Particles.cpp b/nGenEx/Particles.cpp index 820d2a3..a8efbec 100644 --- a/nGenEx/Particles.cpp +++ b/nGenEx/Particles.cpp @@ -1,264 +1,288 @@ -/* Project nGenEx - Destroyer Studios LLC - Copyright © 1997-2004. All Rights Reserved. - - SUBSYSTEM: nGenEx.lib - FILE: Particles.cpp - AUTHOR: John DiCamillo - - - OVERVIEW - ======== - Particle Burst class -*/ - -#include "MemDebug.h" -#include "Particles.h" -#include "Projector.h" -#include "Light.h" -#include "Bitmap.h" -#include "Game.h" -#include "Random.h" - -// +--------------------------------------------------------------------+ - -inline float randf() { return (rand()-16384.0f)/32768.0f; } - -// +--------------------------------------------------------------------+ - -Particles::Particles(Bitmap* bitmap, int np, const Vec3& base_loc, const Vec3& vel, -float bspeed, float dr, float s, float bloom, float dec, float rate, -bool cont, bool trail, bool rise, int a, int nframes) -: nparts(np), base_speed(bspeed), max_speed(bspeed*3.0f), -drag(dr), min_scale(s), max_scale(bloom), decay(dec), -release_rate(rate), continuous(cont), trailing(trail), rising(rise), -blend(a), extra(0.0f), point_sprite(0), emitting(true) -{ - MoveTo(base_loc); - ref_loc = base_loc; - - trans = true; - luminous = true; - shadow = false; - nverts = nparts; - - if (max_scale < min_scale) - max_scale = min_scale; - - velocity = new(__FILE__,__LINE__) Point[nverts]; - part_loc = new(__FILE__,__LINE__) Point[nverts]; - release = new(__FILE__,__LINE__) Point[nverts]; - intensity = new(__FILE__,__LINE__) float[nverts]; - timestamp = new(__FILE__,__LINE__) float[nverts]; - scale = new(__FILE__,__LINE__) float[nverts]; - angle = new(__FILE__,__LINE__) float[nverts]; - frame = new(__FILE__,__LINE__) BYTE[nverts]; - - float speed = base_speed; - - for (int i = 0; i < nverts; i++) { - intensity[i] = 1.0f; - timestamp[i] = (float) (Game::GameTime() / 1000.0); - scale[i] = (float) (min_scale); - angle[i] = (float) (Random(0, 2*PI)); - frame[i] = 0; - - part_loc[i] = Point(); - release[i] = ref_loc; - velocity[i] = RandomVector(speed); - velocity[i] += vel; - - if (speed < max_speed) - speed += (float) Random(max_speed/15.0, max_speed/5.0); - else - speed = base_speed; - } - - radius = 15000.0f; - - if (decay > 2) - decay /= 256.0f; - - if (nparts < 8) { - nverts = 1; - } - - else if (nparts > 50 || continuous) { - nverts = (int) (nparts * 0.125 * release_rate); - } - - point_sprite = new(__FILE__,__LINE__) Sprite(bitmap, nframes); - point_sprite->Scale(s); - point_sprite->SetBlendMode(blend); - point_sprite->SetFrameRate(nframes * decay); -} - -Particles::~Particles() -{ - delete point_sprite; - delete [] velocity; - delete [] part_loc; - delete [] release; - delete [] timestamp; - delete [] intensity; - delete [] scale; - delete [] angle; - delete [] frame; -} - -// +--------------------------------------------------------------------+ - -void Particles::ExecFrame(double seconds) -{ - point_sprite->Update(); - - ref_loc = loc; - radius += max_speed * (float) seconds; - - float scaled_drag = (float) exp(-drag * seconds); - float scale_inc = (float) ((max_scale-min_scale)*seconds*2); - - for (int i = 0; i < nverts; i++) { - part_loc[i] += velocity[i] * (float) seconds; - - if (rising) { - part_loc[i].y += (float) ((randf() + 1) * scale[i] * 80 * seconds); - } - - // do the (chunky) blooming effect: - if (max_scale > 0 && scale[i] < max_scale) { - scale[i] += scale_inc * (float) ((i%3)/3.0); - } - - double rho = angle[i]; - int rot = i%4; - switch (rot) { - case 0: rho += seconds * 0.13; break; - case 1: rho -= seconds * 0.11; break; - case 2: rho += seconds * 0.09; break; - case 3: rho -= seconds * 0.07; break; - default: break; - } - - angle[i] = (float) rho; - intensity[i] -= (float) (decay * seconds); - - if (point_sprite->NumFrames() > 1) { - double age = Game::GameTime()/1000.0 - timestamp[i]; - int n = (int) (age * point_sprite->FrameRate()); - - if (n >= point_sprite->NumFrames()) - n = point_sprite->NumFrames() - 1; - - frame[i] = n; - } - - velocity[i] *= scaled_drag; - } - - if (nverts < nparts && emitting) { - int nv = nverts; - double delta = nparts * release_rate * seconds; - int new_parts = (int) (delta + extra); - extra = (float) (delta + extra - new_parts); - nverts += new_parts; - - if (nverts > nparts) - nverts = nparts; - - for (int i = nv; i < nverts; i++) { - intensity[i] = 1; - timestamp[i] = (float) (Game::GameTime() / 1000.0); - scale[i] = (float) (min_scale); - angle[i] = (float) (Random(0, 2*PI)); - frame[i] = 0; - part_loc[i] = Point(); - release[i] = ref_loc; - } - } - - if (nverts > nparts) - nverts = nparts; - - // recycle dead particles: - if (continuous) { - float speed = base_speed; - - for (int i = 0; i < nverts; i++) { - if (intensity[i] <= 0) { - part_loc[i] = Point(); - release[i] = ref_loc; - - intensity[i] = 1; - timestamp[i] = (float) (Game::GameTime() / 1000.0); - scale[i] = (float) (min_scale); - angle[i] = (float) (PI * rand() / 16384.0); - frame[i] = 0; - velocity[i] = RandomVector(speed); - - if (speed < max_speed) - speed += (float) Random(max_speed/25.0, max_speed/18.0); - else - speed = base_speed; - } - } - } -} - -// +--------------------------------------------------------------------+ - -bool -Particles::CheckVisibility(Projector& projector) -{ - float base = 256; - - if (point_sprite && point_sprite->Frame()) - base = (float) point_sprite->Frame()->Width(); - - float particle_radius = base * max_scale; - - if (projector.IsVisible( Location(), Radius()) && - projector.ApparentRadius(Location(), particle_radius) > 1) { - - visible = true; - } - else { - visible = false; - } - - return visible; -} - -// +--------------------------------------------------------------------+ - -void -Particles::Render(Video* video, DWORD flags) -{ - if (hidden || !visible || !video || !point_sprite) - return; - - if (blend == 2 && !(flags & Graphic::RENDER_ALPHA)) - return; - - if (blend == 4 && !(flags & Graphic::RENDER_ADDITIVE)) - return; - - for (int i = 0; i < nverts; i++) { - Point vloc; - - if (trailing) { - vloc = part_loc[i] + release[i] - offset; - } - else { - vloc = part_loc[i] + loc; - } - - point_sprite->MoveTo(vloc); - point_sprite->SetShade(intensity[i]); - point_sprite->Rescale(scale[i]); - point_sprite->SetAngle(angle[i]); - point_sprite->SetFrameIndex(frame[i]); - - point_sprite->Render(video, flags); - } -} +/* Starshatter OpenSource Distribution + Copyright (c) 1997-2004, Destroyer Studios LLC. + 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 "Destroyer Studios" 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 HOLDER 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. + + SUBSYSTEM: nGenEx.lib + FILE: Particles.cpp + AUTHOR: John DiCamillo + + + OVERVIEW + ======== + Particle Burst class +*/ + +#include "MemDebug.h" +#include "Particles.h" +#include "Projector.h" +#include "Light.h" +#include "Bitmap.h" +#include "Game.h" +#include "Random.h" + +// +--------------------------------------------------------------------+ + +inline float randf() { return (rand()-16384.0f)/32768.0f; } + +// +--------------------------------------------------------------------+ + +Particles::Particles(Bitmap* bitmap, int np, const Vec3& base_loc, const Vec3& vel, +float bspeed, float dr, float s, float bloom, float dec, float rate, +bool cont, bool trail, bool rise, int a, int nframes) +: nparts(np), base_speed(bspeed), max_speed(bspeed*3.0f), +drag(dr), min_scale(s), max_scale(bloom), decay(dec), +release_rate(rate), continuous(cont), trailing(trail), rising(rise), +blend(a), extra(0.0f), point_sprite(0), emitting(true) +{ + MoveTo(base_loc); + ref_loc = base_loc; + + trans = true; + luminous = true; + shadow = false; + nverts = nparts; + + if (max_scale < min_scale) + max_scale = min_scale; + + velocity = new(__FILE__,__LINE__) Point[nverts]; + part_loc = new(__FILE__,__LINE__) Point[nverts]; + release = new(__FILE__,__LINE__) Point[nverts]; + intensity = new(__FILE__,__LINE__) float[nverts]; + timestamp = new(__FILE__,__LINE__) float[nverts]; + scale = new(__FILE__,__LINE__) float[nverts]; + angle = new(__FILE__,__LINE__) float[nverts]; + frame = new(__FILE__,__LINE__) BYTE[nverts]; + + float speed = base_speed; + + for (int i = 0; i < nverts; i++) { + intensity[i] = 1.0f; + timestamp[i] = (float) (Game::GameTime() / 1000.0); + scale[i] = (float) (min_scale); + angle[i] = (float) (Random(0, 2*PI)); + frame[i] = 0; + + part_loc[i] = Point(); + release[i] = ref_loc; + velocity[i] = RandomVector(speed); + velocity[i] += vel; + + if (speed < max_speed) + speed += (float) Random(max_speed/15.0, max_speed/5.0); + else + speed = base_speed; + } + + radius = 15000.0f; + + if (decay > 2) + decay /= 256.0f; + + if (nparts < 8) { + nverts = 1; + } + + else if (nparts > 50 || continuous) { + nverts = (int) (nparts * 0.125 * release_rate); + } + + point_sprite = new(__FILE__,__LINE__) Sprite(bitmap, nframes); + point_sprite->Scale(s); + point_sprite->SetBlendMode(blend); + point_sprite->SetFrameRate(nframes * decay); +} + +Particles::~Particles() +{ + delete point_sprite; + delete [] velocity; + delete [] part_loc; + delete [] release; + delete [] timestamp; + delete [] intensity; + delete [] scale; + delete [] angle; + delete [] frame; +} + +// +--------------------------------------------------------------------+ + +void Particles::ExecFrame(double seconds) +{ + point_sprite->Update(); + + ref_loc = loc; + radius += max_speed * (float) seconds; + + float scaled_drag = (float) exp(-drag * seconds); + float scale_inc = (float) ((max_scale-min_scale)*seconds*2); + + for (int i = 0; i < nverts; i++) { + part_loc[i] += velocity[i] * (float) seconds; + + if (rising) { + part_loc[i].y += (float) ((randf() + 1) * scale[i] * 80 * seconds); + } + + // do the (chunky) blooming effect: + if (max_scale > 0 && scale[i] < max_scale) { + scale[i] += scale_inc * (float) ((i%3)/3.0); + } + + double rho = angle[i]; + int rot = i%4; + switch (rot) { + case 0: rho += seconds * 0.13; break; + case 1: rho -= seconds * 0.11; break; + case 2: rho += seconds * 0.09; break; + case 3: rho -= seconds * 0.07; break; + default: break; + } + + angle[i] = (float) rho; + intensity[i] -= (float) (decay * seconds); + + if (point_sprite->NumFrames() > 1) { + double age = Game::GameTime()/1000.0 - timestamp[i]; + int n = (int) (age * point_sprite->FrameRate()); + + if (n >= point_sprite->NumFrames()) + n = point_sprite->NumFrames() - 1; + + frame[i] = n; + } + + velocity[i] *= scaled_drag; + } + + if (nverts < nparts && emitting) { + int nv = nverts; + double delta = nparts * release_rate * seconds; + int new_parts = (int) (delta + extra); + extra = (float) (delta + extra - new_parts); + nverts += new_parts; + + if (nverts > nparts) + nverts = nparts; + + for (int i = nv; i < nverts; i++) { + intensity[i] = 1; + timestamp[i] = (float) (Game::GameTime() / 1000.0); + scale[i] = (float) (min_scale); + angle[i] = (float) (Random(0, 2*PI)); + frame[i] = 0; + part_loc[i] = Point(); + release[i] = ref_loc; + } + } + + if (nverts > nparts) + nverts = nparts; + + // recycle dead particles: + if (continuous) { + float speed = base_speed; + + for (int i = 0; i < nverts; i++) { + if (intensity[i] <= 0) { + part_loc[i] = Point(); + release[i] = ref_loc; + + intensity[i] = 1; + timestamp[i] = (float) (Game::GameTime() / 1000.0); + scale[i] = (float) (min_scale); + angle[i] = (float) (PI * rand() / 16384.0); + frame[i] = 0; + velocity[i] = RandomVector(speed); + + if (speed < max_speed) + speed += (float) Random(max_speed/25.0, max_speed/18.0); + else + speed = base_speed; + } + } + } +} + +// +--------------------------------------------------------------------+ + +bool +Particles::CheckVisibility(Projector& projector) +{ + float base = 256; + + if (point_sprite && point_sprite->Frame()) + base = (float) point_sprite->Frame()->Width(); + + float particle_radius = base * max_scale; + + if (projector.IsVisible( Location(), Radius()) && + projector.ApparentRadius(Location(), particle_radius) > 1) { + + visible = true; + } + else { + visible = false; + } + + return visible; +} + +// +--------------------------------------------------------------------+ + +void +Particles::Render(Video* video, DWORD flags) +{ + if (hidden || !visible || !video || !point_sprite) + return; + + if (blend == 2 && !(flags & Graphic::RENDER_ALPHA)) + return; + + if (blend == 4 && !(flags & Graphic::RENDER_ADDITIVE)) + return; + + for (int i = 0; i < nverts; i++) { + Point vloc; + + if (trailing) { + vloc = part_loc[i] + release[i] - offset; + } + else { + vloc = part_loc[i] + loc; + } + + point_sprite->MoveTo(vloc); + point_sprite->SetShade(intensity[i]); + point_sprite->Rescale(scale[i]); + point_sprite->SetAngle(angle[i]); + point_sprite->SetFrameIndex(frame[i]); + + point_sprite->Render(video, flags); + } +} -- cgit v1.1