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engines/stark/visual/effects/fish.cpp
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engines/stark/visual/effects/fish.cpp
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "engines/stark/visual/effects/fish.h"
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#include "common/random.h"
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#include "common/tokenizer.h"
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#include "graphics/surface.h"
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#include "engines/stark/gfx/driver.h"
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#include "engines/stark/gfx/surfacerenderer.h"
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#include "engines/stark/gfx/bitmap.h"
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#include "engines/stark/services/global.h"
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#include "engines/stark/services/services.h"
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#include "engines/stark/services/settings.h"
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namespace Stark {
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VisualEffectFish::VisualEffectFish(Gfx::Driver *gfx, const Common::Point &size) :
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VisualEffect(TYPE, size, gfx),
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_fishCount(10),
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_currentFrame(0),
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_numFrames(20),
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_maxRadius(100),
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_fishPathWidthRatio(20),
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_fishPathHeightRatio(30),
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_fishPathWidth(0),
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_fishPathHeight(0),
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_masterPathWidth(0),
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_masterPathHeight(0),
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_mainColorR(44),
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_mainColorG(97),
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_mainColorB(133),
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_mainColor(0),
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_otherColor(0) {
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}
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VisualEffectFish::~VisualEffectFish() {
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}
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void VisualEffectFish::render(const Common::Point &position) {
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// Stop rendering if special effect is off
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if (!StarkSettings->getBoolSetting(Settings::kSpecialFX)) return;
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_timeRemainingUntilNextUpdate -= StarkGlobal->getMillisecondsPerGameloop();
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if (_timeRemainingUntilNextUpdate <= 0) {
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update();
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_timeRemainingUntilNextUpdate = _timeBetweenTwoUpdates;
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}
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// Fill with transparent color
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_surface->fillRect(Common::Rect(_surface->w, _surface->h), 0);
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for (uint i = 0; i < _fishList.size(); i++) {
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drawFish(_fishList[i]);
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}
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_bitmap->update(_surface);
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_surfaceRenderer->render(_bitmap, position);
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}
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void VisualEffectFish::setParams(const Common::String ¶ms) {
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// Example input: GFX_Fish( 2, 30, 20, 30, (20, 50, 70), 20, 100 )
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Common::StringTokenizer tokenizer(params, "(), ");
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int index = 0;
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while (!tokenizer.empty()) {
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Common::String token = tokenizer.nextToken();
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switch (index) {
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case 0:
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if (token != "GFX_Fish") {
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error("Unexpected effect type '%s'", token.c_str());
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}
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break;
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case 1:
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_timeBetweenTwoUpdates = CLIP<uint>(strtol(token.c_str(), nullptr, 10), 0, 1000) * 33;
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break;
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case 2:
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_fishCount = CLIP<uint>(strtol(token.c_str(), nullptr, 10), 1, 300);
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break;
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case 3:
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_fishPathWidthRatio = CLIP<int>(strtol(token.c_str(), nullptr, 10), 0, 100);
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break;
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case 4:
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_fishPathHeightRatio = CLIP<int>(strtol(token.c_str(), nullptr, 10), 0, 100);
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break;
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case 5:
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_mainColorR = strtol(token.c_str(), nullptr, 10);
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break;
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case 6:
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_mainColorG = strtol(token.c_str(), nullptr, 10);
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break;
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case 7:
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_mainColorB = strtol(token.c_str(), nullptr, 10);
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break;
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case 8:
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_numFrames = CLIP<uint>(strtol(token.c_str(), nullptr, 10), 10, 100);
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break;
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case 9:
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_maxRadius = CLIP<uint>(strtol(token.c_str(), nullptr, 10), 30, 200);
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break;
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default:
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warning("Unexpected parameter %d: %s", index, token.c_str());
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}
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index++;
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}
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_mainColor = _surface->format.RGBToColor(_mainColorR, _mainColorG, _mainColorB);
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_otherColor = _surface->format.RGBToColor(
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_mainColorR + (255 - _mainColorR) / 4,
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_mainColorG + (255 - _mainColorG) / 4,
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_mainColorB + (255 - _mainColorB) / 3
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);
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_fishPathWidth = _size.x * _fishPathWidthRatio / 100;
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_fishPathHeight = _size.y * _fishPathHeightRatio / 100;
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_masterPathWidth = _size.x - _fishPathWidth;
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_masterPathHeight = _size.y - _fishPathHeight;
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_numFrames = 20; // The original also ignores the parameter
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_frames.resize(_numFrames);
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for (uint i = 0; i < _frames.size(); i++) {
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Frame &frame = _frames[i];
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// Barycentric coordinates
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float t = (i + 1) / (float)_frames.size();
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frame.weight1 = (1.0f - t) * (1.0f - t) * (1.0f - t) / 6.0f;
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frame.weight2 = (t * t * t * 3.0f - t * t * 6.0f + 4.0f) / 6.0f;
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frame.weight3 = (((3.0f - t * 3.0f) * t + 3.0f) * t + 1.0f) / 6.0f;
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frame.weight4 = t * t * t / 6.0f;
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}
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_fishList.resize(_fishCount);
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for (uint i = 0; i < _fishList.size(); i++) {
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Fish &fish = _fishList[i];
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fish.point1.x = StarkRandomSource->getRandomNumber(_fishPathWidth - 1);
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fish.point1.y = StarkRandomSource->getRandomNumber(_fishPathHeight - 1);
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fish.point2.x = StarkRandomSource->getRandomNumber(_fishPathWidth - 1);
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fish.point2.y = StarkRandomSource->getRandomNumber(_fishPathHeight - 1);
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fish.point3.x = StarkRandomSource->getRandomNumber(_fishPathWidth - 1);
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fish.point3.y = StarkRandomSource->getRandomNumber(_fishPathHeight - 1);
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fish.point4.x = StarkRandomSource->getRandomNumber(_fishPathWidth - 1);
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fish.point4.y = StarkRandomSource->getRandomNumber(_fishPathHeight - 1);
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}
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_masterPath.point1.x = StarkRandomSource->getRandomNumber(_masterPathWidth - 1);
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_masterPath.point1.y = StarkRandomSource->getRandomNumber(_masterPathHeight - 1);
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_masterPath.point2 = _masterPath.point1;
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_masterPath.point3 = _masterPath.point1;
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_masterPath.point4 = _masterPath.point1;
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}
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void VisualEffectFish::update() {
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_currentFrame++;
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if (_currentFrame >= _frames.size()) {
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_currentFrame %= _frames.size();
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for (uint i = 0; i < _fishList.size(); i++) {
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Fish &fish = _fishList[i];
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fish.point1 = fish.point2;
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fish.point2 = fish.point3;
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fish.point3 = fish.point4;
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fish.point4.x = StarkRandomSource->getRandomNumber(_fishPathWidth - 1);
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fish.point4.y = StarkRandomSource->getRandomNumber(_fishPathHeight - 1);
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}
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_masterPath.point1 = _masterPath.point2;
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_masterPath.point2 = _masterPath.point3;
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_masterPath.point3 = _masterPath.point4;
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uint radius;
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do {
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_masterPath.point4.x = StarkRandomSource->getRandomNumber(_masterPathWidth - 1);
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_masterPath.point4.y = StarkRandomSource->getRandomNumber(_masterPathHeight - 1);
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int deltaX = _masterPath.point4.x - _masterPath.point3.x;
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int deltaY = _masterPath.point4.y - _masterPath.point3.y;
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radius = sqrt(deltaX * deltaX + deltaY * deltaY);
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} while (radius > _maxRadius);
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}
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const Frame &frame = _frames[_currentFrame];
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_masterPath.currentPosition.x = _masterPath.point1.x * frame.weight1 + _masterPath.point2.x * frame.weight2
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+ _masterPath.point3.x * frame.weight3 + _masterPath.point4.x * frame.weight4;
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_masterPath.currentPosition.y = _masterPath.point1.y * frame.weight1 + _masterPath.point2.y * frame.weight2
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+ _masterPath.point3.y * frame.weight3 + _masterPath.point4.y * frame.weight4;
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for (uint i = 0; i < _fishList.size(); i++) {
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Fish &fish = _fishList[i];
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fish.previousPosition = fish.currentPosition;
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fish.currentPosition.x = fish.point1.x * frame.weight1 + fish.point2.x * frame.weight2
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+ fish.point3.x * frame.weight3 + fish.point4.x * frame.weight4;
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fish.currentPosition.y = fish.point1.y * frame.weight1 + fish.point2.y * frame.weight2
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+ fish.point3.y * frame.weight3 + fish.point4.y * frame.weight4;
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fish.currentPosition += _masterPath.currentPosition;
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}
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}
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void VisualEffectFish::drawFish(const Fish &fish) {
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if (fish.currentPosition.x < 0 || fish.currentPosition.x >= _surface->w
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|| fish.currentPosition.y < 0 || fish.currentPosition.y >= _surface->h) {
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return;
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}
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if (fish.previousPosition.x < 0 || fish.previousPosition.x >= _surface->w
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|| fish.previousPosition.y < 0 || fish.previousPosition.y >= _surface->h) {
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return;
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}
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int dot = (fish.previousPosition.x - fish.currentPosition.x)
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* (fish.previousPosition.x - fish.currentPosition.x)
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+ (fish.previousPosition.y - fish.currentPosition.y)
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* (fish.previousPosition.y - fish.currentPosition.y);
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uint color;
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if (dot >= 4) {
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color = _mainColor;
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} else {
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color = _otherColor;
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}
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_surface->drawLine(fish.previousPosition.x, fish.previousPosition.y,
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fish.currentPosition.x, fish.currentPosition.y, color);
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}
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} // End of namespace Stark
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