diff options
Diffstat (limited to 'nGenEx/Particles.cpp')
| -rw-r--r-- | nGenEx/Particles.cpp | 414 |
1 files changed, 207 insertions, 207 deletions
diff --git a/nGenEx/Particles.cpp b/nGenEx/Particles.cpp index d774bb0..820d2a3 100644 --- a/nGenEx/Particles.cpp +++ b/nGenEx/Particles.cpp @@ -1,15 +1,15 @@ /* Project nGenEx
- Destroyer Studios LLC
- Copyright © 1997-2004. All Rights Reserved.
+ Destroyer Studios LLC
+ Copyright © 1997-2004. All Rights Reserved.
- SUBSYSTEM: nGenEx.lib
- FILE: Particles.cpp
- AUTHOR: John DiCamillo
+ SUBSYSTEM: nGenEx.lib
+ FILE: Particles.cpp
+ AUTHOR: John DiCamillo
- OVERVIEW
- ========
- Particle Burst class
+ OVERVIEW
+ ========
+ Particle Burst class
*/
#include "MemDebug.h"
@@ -27,182 +27,182 @@ 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)
+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);
+ 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;
+ 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;
- }
- }
- }
+ 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;
+ }
+ }
+ }
}
// +--------------------------------------------------------------------+
@@ -210,23 +210,23 @@ void Particles::ExecFrame(double seconds) bool
Particles::CheckVisibility(Projector& projector)
{
- float base = 256;
+ float base = 256;
- if (point_sprite && point_sprite->Frame())
- base = (float) point_sprite->Frame()->Width();
+ if (point_sprite && point_sprite->Frame())
+ base = (float) point_sprite->Frame()->Width();
- float particle_radius = base * max_scale;
+ float particle_radius = base * max_scale;
- if (projector.IsVisible( Location(), Radius()) &&
- projector.ApparentRadius(Location(), particle_radius) > 1) {
+ if (projector.IsVisible( Location(), Radius()) &&
+ projector.ApparentRadius(Location(), particle_radius) > 1) {
- visible = true;
- }
- else {
- visible = false;
- }
-
- return visible;
+ visible = true;
+ }
+ else {
+ visible = false;
+ }
+
+ return visible;
}
// +--------------------------------------------------------------------+
@@ -234,31 +234,31 @@ Particles::CheckVisibility(Projector& projector) void
Particles::Render(Video* video, DWORD flags)
{
- if (hidden || !visible || !video || !point_sprite)
- return;
+ if (hidden || !visible || !video || !point_sprite)
+ return;
- if (blend == 2 && !(flags & Graphic::RENDER_ALPHA))
- return;
+ if (blend == 2 && !(flags & Graphic::RENDER_ALPHA))
+ return;
- if (blend == 4 && !(flags & Graphic::RENDER_ADDITIVE))
- return;
+ if (blend == 4 && !(flags & Graphic::RENDER_ADDITIVE))
+ return;
- for (int i = 0; i < nverts; i++) {
- Point vloc;
+ for (int i = 0; i < nverts; i++) {
+ Point vloc;
- if (trailing) {
- vloc = part_loc[i] + release[i] - offset;
- }
- else {
- vloc = part_loc[i] + loc;
- }
+ 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->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);
- }
+ point_sprite->Render(video, flags);
+ }
}
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