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Diffstat (limited to 'Stars45/DriveSprite.cpp')
-rw-r--r-- | Stars45/DriveSprite.cpp | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/Stars45/DriveSprite.cpp b/Stars45/DriveSprite.cpp new file mode 100644 index 0000000..3590b48 --- /dev/null +++ b/Stars45/DriveSprite.cpp @@ -0,0 +1,167 @@ +/* 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: Stars.exe + FILE: DriveSprite.cpp + AUTHOR: John DiCamillo + + + OVERVIEW + ======== + Sprite for rendering drive flares. Remains visible at extreme ranges. +*/ + +#include "MemDebug.h" +#include "DriveSprite.h" + +#include "Bitmap.h" +#include "Camera.h" +#include "Scene.h" +#include "Video.h" + +// +--------------------------------------------------------------------+ + +DriveSprite::DriveSprite() + : Sprite(), glow(0), effective_radius(0), front(0,0,0), bias(0) +{ luminous = true; } + +DriveSprite::DriveSprite(Bitmap* animation, Bitmap* g) + : Sprite(animation), glow(g), effective_radius(0), front(0,0,0), bias(0) +{ luminous = true; } + +DriveSprite::DriveSprite(Bitmap* animation, int length, int repeat, int share) + : Sprite(animation, length, repeat, share), glow(0), effective_radius(0), + front(0,0,0), bias(0) +{ luminous = true; } + +DriveSprite::~DriveSprite() +{ } + +// +--------------------------------------------------------------------+ + +void +DriveSprite::SetFront(const Vec3& f) +{ + front = f; + front.Normalize(); +} + +void +DriveSprite::SetBias(DWORD b) +{ + bias = b; +} + +// +--------------------------------------------------------------------+ + +void +DriveSprite::Render(Video* video, DWORD flags) +{ + if (!video || ((flags & RENDER_ADDITIVE) == 0)) + return; + + if (shade > 0 && !hidden && (life > 0 || loop)) { + const Camera* cam = video->GetCamera(); + bool z_disable = false; + + if (bias) + video->SetRenderState(Video::Z_BIAS, bias); + + if (front.length()) { + Point test = loc; + + if (scene && cam) { + Vec3 dir = front; + + double intensity = cam->vpn() * dir * -1; + double distance = Point(cam->Pos() - test).length(); + + if (intensity > 0.05) { + if (!scene->IsLightObscured(cam->Pos(), test, 8)) { + video->SetRenderState(Video::Z_ENABLE, false); + z_disable = true; + + if (glow) { + intensity = pow(intensity, 3); + + if (distance > 5e3) + intensity *= (1 - (distance-5e3)/45e3); + + if (intensity > 0) { + Bitmap* tmp_frame = frames; + double tmp_shade = shade; + int tmp_w = w; + int tmp_h = h; + + if (glow->Width() != frames->Width()) { + double wscale = glow->Width() / frames->Width(); + double hscale = glow->Height() / frames->Height(); + + w = (int) (w * wscale); + h = (int) (h * hscale); + } + + shade = intensity; + frames = glow; + + Sprite::Render(video, flags); + + frames = tmp_frame; + shade = tmp_shade; + w = tmp_w; + h = tmp_h; + } + } + } + } + } + } + + if (effective_radius-radius > 0.1) { + double scale_up = effective_radius / radius; + int tmp_w = w; + int tmp_h = h; + + w = (int) (w * scale_up); + h = (int) (h * scale_up); + + Sprite::Render(video, flags); + + w = tmp_w; + h = tmp_h; + } + + else { + Sprite::Render(video, flags); + } + + if (bias) video->SetRenderState(Video::Z_BIAS, 0); + if (z_disable) video->SetRenderState(Video::Z_ENABLE, true); + } +} + |