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Diffstat (limited to 'Stars45/Particles.cpp')
| -rw-r--r-- | Stars45/Particles.cpp | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/Stars45/Particles.cpp b/Stars45/Particles.cpp deleted file mode 100644 index 911b06f..0000000 --- a/Stars45/Particles.cpp +++ /dev/null @@ -1,262 +0,0 @@ -/* Starshatter: The Open Source Project - Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors - Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors - Copyright (c) 1997-2006, Destroyer Studios LLC. - - AUTHOR: John DiCamillo - - - OVERVIEW - ======== - Particle Burst class -*/ - -#include "Particles.h" -#include "Projector.h" -#include "Light.h" -#include "Bitmap.h" -#include "Clock.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 Point[nverts]; - part_loc = new Point[nverts]; - release = new Point[nverts]; - intensity = new float[nverts]; - timestamp = new float[nverts]; - scale = new float[nverts]; - angle = new float[nverts]; - frame = new BYTE[nverts]; - - float speed = base_speed; - - for (int i = 0; i < nverts; i++) { - intensity[i] = 1.0f; - timestamp[i] = (float) (Clock::GetInstance()->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 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 = Clock::GetInstance()->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) (Clock::GetInstance()->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) (Clock::GetInstance()->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); - } -} |