90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
//
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// Tracer.cpp
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// OpenSpades
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//
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// Created by Tomoaki Kawada on 8/30/13.
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// Copyright (c) 2013 yvt.jp. All rights reserved.
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//
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#include "Tracer.h"
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#include "Client.h"
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#include "IRenderer.h"
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#include <Draw/SWRenderer.h>
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namespace spades {
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namespace client {
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Tracer::Tracer(Client *cli, Vector3 p1, Vector3 p2, float bulletVel)
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: client(cli), startPos(p1), velocity(bulletVel) {
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dir = (p2 - p1).Normalize();
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length = (p2 - p1).GetLength();
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velocity *= 0.5f; // make it slower for visual effect
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const float maxTimeSpread = 1.0f / 30.f;
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const float shutterTime = 1.0f / 30.f;
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visibleLength = shutterTime * velocity;
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curDistance = -visibleLength;
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curDistance += maxTimeSpread * GetRandom();
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firstUpdate = true;
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image = cli->GetRenderer()->RegisterImage("Gfx/Ball.png");
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}
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bool Tracer::Update(float dt) {
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if (!firstUpdate) {
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curDistance += dt * velocity;
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if (curDistance > length) {
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return false;
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}
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}
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firstUpdate = false;
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return true;
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}
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void Tracer::Render3D() {
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IRenderer *r = client->GetRenderer();
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if (dynamic_cast<draw::SWRenderer *>(r)) {
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// SWRenderer doesn't support long sprites (yet)
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float startDist = curDistance;
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float endDist = curDistance + visibleLength;
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startDist = std::max(startDist, 0.f);
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endDist = std::min(endDist, length);
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if (startDist >= endDist) {
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return;
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}
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Vector3 pos1 = startPos + dir * startDist;
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Vector3 pos2 = startPos + dir * endDist;
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Vector4 col = {1.f, .6f, .2f, 0.f};
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r->AddDebugLine(pos1, pos2, Vector4{1.0f, 0.6f, 0.2f, 1.0f});
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} else {
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for (float step = 0.0f; step <= 1.0f; step += 0.1f) {
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float startDist = curDistance;
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float endDist = curDistance + visibleLength;
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float midDist = (startDist + endDist) * 0.5f;
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startDist = Mix(startDist, midDist, step);
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endDist = Mix(endDist, midDist, step);
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startDist = std::max(startDist, 0.f);
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endDist = std::min(endDist, length);
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if (startDist >= endDist) {
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continue;
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}
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Vector3 pos1 = startPos + dir * startDist;
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Vector3 pos2 = startPos + dir * endDist;
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Vector4 col = {1.f, .6f, .2f, 0.f};
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r->SetColorAlphaPremultiplied(col * 0.4f);
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r->AddLongSprite(image, pos1, pos2, .05f);
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}
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}
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}
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Tracer::~Tracer() {}
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}
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}
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