5e25ffe30b
Originally committed to SVN as r1363.
207 lines
5.1 KiB
C++
207 lines
5.1 KiB
C++
// Copyright (c) 2007, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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///////////
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// Headers
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#include "spline.h"
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/////////////////////
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// Curve constructor
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SplineCurve::SplineCurve() {
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x1=x2=x3=x4=y1=y2=y3=y4=0;
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type = CURVE_INVALID;
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}
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//////////////////////
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// Spline constructor
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Spline::Spline() {
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}
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/////////////////
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// Encode to ASS
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wxString Spline::EncodeToASS() {
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wxString result;
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char lastCommand = 0;
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// At least one element?
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bool isFirst = true;
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// Insert each element
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for (std::list<SplineCurve>::iterator cur = curves.begin();cur!=curves.end();cur++) {
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// Start of spline
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if (isFirst) {
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result = wxString::Format(_T("m %i %i"),cur->x1,cur->y1);
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lastCommand = 'm';
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isFirst = false;
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}
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// Each curve
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switch (cur->type) {
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case CURVE_LINE:
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if (lastCommand != 'l') {
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result += _T("l ");
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lastCommand = 'l';
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}
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result += wxString::Format(_T("%i %i"),cur->x2,cur->y2);
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break;
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case CURVE_BICUBIC:
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if (lastCommand != 'b') {
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result += _T("b ");
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lastCommand = 'b';
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}
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result += wxString::Format(_T("%i %i %i %i"),cur->x2,cur->y2,cur->x3,cur->y3,cur->x4,cur->y4);
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break;
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default: break;
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}
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}
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return result;
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}
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///////////////////
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// Decode from ASS
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void Spline::DecodeFromASS(wxString str) {
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// Clear current
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curves.clear();
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}
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////////////////////////////////
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// Append a curve to the spline
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void Spline::AppendCurve(SplineCurve &curve) {
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curves.push_back(curve);
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}
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////////////////////////////////////////
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// Moves a specific point in the spline
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void Spline::MovePoint(int curveIndex,int point,wxPoint pos) {
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int i = 0;
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for (std::list<SplineCurve>::iterator cur = curves.begin();cur!=curves.end();cur++) {
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if (i == curveIndex) {
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switch (point) {
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case 0:
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cur->x1 = pos.x;
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cur->y1 = pos.y;
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break;
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case 1:
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cur->x2 = pos.x;
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cur->y2 = pos.y;
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break;
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case 2:
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cur->x3 = pos.x;
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cur->y3 = pos.y;
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break;
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case 3:
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cur->x4 = pos.x;
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cur->y4 = pos.y;
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break;
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}
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return;
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}
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i++;
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}
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}
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//////////////////////////////////////
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// Gets a list of points in the curve
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void Spline::GetPointList(std::vector<wxPoint> &points) {
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// Prepare
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points.clear();
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wxPoint pt;
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bool isFirst = true;
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// Generate points for each curve
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for (std::list<SplineCurve>::iterator cur = curves.begin();cur!=curves.end();cur++) {
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// First point
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if (isFirst) {
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pt.x = cur->x1;
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pt.y = cur->y1;
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points.push_back(pt);
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}
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// Line
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if (cur->type == CURVE_LINE) {
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pt.x = cur->x2;
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pt.y = cur->y2;
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points.push_back(pt);
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}
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// Bicubic
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else if (cur->type == CURVE_BICUBIC) {
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// Get the control points
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int x1 = cur->x1;
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int x2 = cur->x2;
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int x3 = cur->x3;
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int x4 = cur->x4;
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int y1 = cur->y1;
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int y2 = cur->y2;
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int y3 = cur->y3;
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int y4 = cur->y4;
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// Hardcoded at 10 steps for now
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int steps = 10;
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for (int i=0;i<steps;i++) {
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// Get t and t-1 (u)
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float t = float(i)/float(steps);
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float u = 1.0f-t;
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// Calculate the point and insert it
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pt.x = x1*u*u*u + 3*x2*t*u*u + 3*x3*t*t*u + x4*t*t*t;
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pt.y = y1*u*u*u + 3*y2*t*u*u + 3*y3*t*t*u + y4*t*t*t;
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points.push_back(pt);
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}
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}
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}
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}
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//////////////////////////////
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// Point closest to reference
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wxPoint Spline::GetClosestPoint(wxPoint reference) {
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return wxPoint(-1,-1);
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}
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//////////////////////////////////////
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// Control point closest to reference
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wxPoint Spline::GetClosestControlPoint(wxPoint reference) {
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return wxPoint(-1,-1);
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}
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