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Copy pathDrawCamera.cpp
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executable file
·285 lines (248 loc) · 13.1 KB
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/*
* InfiniPaint
* Copyright (C) 2025-2026 Yousef Khadadeh
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "DrawCamera.hpp"
#include "DrawingProgram/Tools/DrawingProgramToolBase.hpp"
#include "Helpers/FixedPoint.hpp"
#include "Helpers/MathExtras.hpp"
#include "MainProgram.hpp"
#include "TimePoint.hpp"
#include "World.hpp"
#include "InputManager.hpp"
#include <Helpers/Logger.hpp>
DrawCamera::DrawCamera():
c({0, 0}, WorldScalar(1000000), 0.0)
{}
void DrawCamera::set_based_on_properties(World& w, const WorldVec& newPos, const WorldScalar& newZoom, double newRotate) {
c.inverseScale = newZoom;
c.pos = newPos;
c.set_rotation(newRotate);
set_viewing_area(w.main.window.size.cast<float>());
}
void DrawCamera::set_based_on_center(World& w, const WorldVec& newPos, const WorldScalar& newZoom, double newRotate) {
c.inverseScale = newZoom;
c.set_rotation(newRotate);
c.pos = newPos - c.dir_from_space(w.main.window.size.cast<float>() * 0.5f);
set_viewing_area(w.main.window.size.cast<float>());
}
void DrawCamera::set_viewing_area(Vector2f viewingAreaNew) {
viewingArea = viewingAreaNew;
float maxDim = std::max(viewingArea.x(), viewingArea.y());
WorldScalar a = WorldScalar(maxDim * 0.708f) * c.inverseScale;
WorldVec center = c.from_space(viewingArea * 0.5f);
viewingAreaGenerousCollider = SCollision::AABB<WorldScalar>(center - WorldVec{a, a}, center + WorldVec{a, a});
}
void DrawCamera::smooth_move_to(World& w, const CoordSpaceHelper& newCoords, Vector2f windowSize, bool instantJump) {
smoothMove.start = c;
smoothMove.end = newCoords;
smoothMove.endWindowSize = windowSize;
smoothMove.startCenter = c.pos + c.dir_from_space(w.main.window.size.cast<float>() * 0.5f);
smoothMove.endCenter = newCoords.pos + newCoords.dir_from_space(windowSize * 0.5f);
float a1(w.main.window.size.x() / windowSize.x());
float a2(w.main.window.size.y() / windowSize.y());
smoothMove.endUniformZoom = std::max(smoothMove.end.inverseScale.multiply_double((a1 < a2) ? a1 : a2), WorldScalar(1));
smoothMove.occurring = true;
smoothMove.moveTime = (instantJump || w.main.conf.jumpTransitionTime <= 0.01f) ? w.main.conf.jumpTransitionTime : 0.0f;
}
void DrawCamera::scale_up(World& w, const WorldScalar& scaleUpAmount) {
smoothMove.occurring = false;
c.scale_about({0, 0}, scaleUpAmount, true);
startZoomVal *= scaleUpAmount;
startZoomMousePos *= scaleUpAmount;
startZoomCameraPos *= scaleUpAmount;
touchInitialC.scale_about({0, 0}, scaleUpAmount, true);
set_viewing_area(w.main.window.size.cast<float>());
}
void DrawCamera::update_main(World& w) {
if(smoothMove.occurring) {
BezierEasing zoomAnim{w.main.conf.jumpTransitionEasing};
float smoothTime = smooth_two_way_animation_time_get_lerp(smoothMove.moveTime, w.main.deltaTime, true, w.main.conf.jumpTransitionTime);
float lerpTime;
float rotationLerpTime = zoomAnim(smoothTime);
lerpTime = zoomAnim(smoothTime);
WorldVec mVec = smoothMove.startCenter - smoothMove.endCenter;
WorldScalar startLog2 = FixedPoint::log2(smoothMove.start.inverseScale);
WorldScalar endLog2 = FixedPoint::log2(smoothMove.endUniformZoom);
WorldVec windowCenter = smoothMove.endCenter;
if(FixedPoint::abs(startLog2 - endLog2) < WorldScalar(3)) {
c.inverseScale = FixedPoint::lerp_double(smoothMove.start.inverseScale, smoothMove.endUniformZoom, lerpTime);
if(lerpTime != 1.0)
windowCenter += WorldVec{mVec.x() / WorldScalar(1.0 / (1.0 - lerpTime)), mVec.y() / WorldScalar(1.0 / (1.0 - lerpTime))};
c.pos = windowCenter - (w.main.window.size.cast<float>() * 0.5f).cast<WorldScalar>() * c.inverseScale;
}
else {
c.inverseScale = FixedPoint::exp2(FixedPoint::lerp_double(startLog2, endLog2, lerpTime));
if(smoothMove.start.inverseScale < smoothMove.endUniformZoom) {
if(smoothMove.start.inverseScale > c.inverseScale)
c.inverseScale = smoothMove.start.inverseScale;
else if(smoothMove.endUniformZoom < c.inverseScale)
c.inverseScale = smoothMove.endUniformZoom;
}
else {
if(smoothMove.start.inverseScale < c.inverseScale)
c.inverseScale = smoothMove.start.inverseScale;
else if(smoothMove.endUniformZoom > c.inverseScale)
c.inverseScale = smoothMove.endUniformZoom;
}
WorldScalar denominator = (smoothMove.endUniformZoom - smoothMove.start.inverseScale);
windowCenter += WorldVec{mVec.x() - ((mVec.x() * c.inverseScale) / denominator) + ((mVec.x() * smoothMove.start.inverseScale) / denominator),
mVec.y() - ((mVec.y() * c.inverseScale) / denominator) + ((mVec.y() * smoothMove.start.inverseScale) / denominator)};
c.pos = windowCenter - (w.main.window.size.cast<float>() * 0.5f).cast<WorldScalar>() * c.inverseScale;
}
c.set_rotation(0.0);
double midRotate = Rotation2D(smoothMove.start.rotation).slerp(rotationLerpTime, Rotation2D(smoothMove.end.rotation)).smallestPositiveAngle();
c.rotate_about(windowCenter, midRotate);
if(smoothTime >= 1.0f) {
c.inverseScale = smoothMove.endUniformZoom;
c.pos = smoothMove.endCenter - (w.main.window.size.cast<float>() * 0.5f).cast<WorldScalar>() * c.inverseScale;
c.set_rotation(0.0);
c.rotate_about(smoothMove.endCenter, smoothMove.end.rotation);
smoothMove.occurring = false;
}
checks_after_input(w);
}
else {
if(w.main.input.key(InputManager::KEY_CAMERA_ROTATE_COUNTERCLOCKWISE).held && !w.main.input.text_is_accepting_input()) {
c.rotate_about(c.from_space(w.main.window.size.cast<float>() * 0.5f), -w.main.deltaTime);
InputManager::MouseMotionCallbackArgs motion{
.pos = w.main.input.mouse.pos,
.move = {0, 0}
};
w.drawProg.drawTool->input_mouse_motion_callback(motion);
w.main.g.gui.set_to_layout();
checks_after_input(w);
}
if(w.main.input.key(InputManager::KEY_CAMERA_ROTATE_CLOCKWISE).held && !w.main.input.text_is_accepting_input()) {
c.rotate_about(c.from_space(w.main.window.size.cast<float>() * 0.5f), w.main.deltaTime);
InputManager::MouseMotionCallbackArgs motion{
.pos = w.main.input.mouse.pos,
.move = {0, 0}
};
w.drawProg.drawTool->input_mouse_motion_callback(motion);
w.main.g.gui.set_to_layout();
checks_after_input(w);
}
}
}
void DrawCamera::checks_after_input(World& w) {
check_if_scale_up_required(w);
set_viewing_area(w.main.window.size.cast<float>());
}
void DrawCamera::check_if_scale_up_required(World& w) {
if(c.inverseScale < WorldScalar(1))
w.scale_up_step();
}
void DrawCamera::input_key_callback(const InputManager::KeyCallbackArgs& key) {
}
void DrawCamera::input_mouse_button_on_canvas_callback(World& w, const InputManager::MouseButtonCallbackArgs& button) {
if(!smoothMove.occurring && !isTouchTransforming && !w.main.g.gui.cursor_obstructed()) {
bool newIsAccurateZooming = (w.drawProg.controls.middleClickHeld && w.main.input.pen.isDown && w.main.conf.tabletOptions.zoomWhilePenDownAndButtonHeld) || // Hold middle click (pen button assigned to middle click) while pen is down
(w.drawProg.controls.middleClickHeld && w.main.input.key(InputManager::KEY_GENERIC_LCTRL).held) || // Hold middle click/pen button while holding control
(w.drawProg.controls.leftClickHeld && w.drawProg.drawTool->get_type() == DrawingProgramToolType::ZOOM); // Hold left click while on zoom tool
if(newIsAccurateZooming && !isAccurateZooming) {
startZoomMousePos = c.from_space(button.pos);
startZoomVal = c.inverseScale;
startZoomCameraPos = c.pos;
}
isAccurateZooming = newIsAccurateZooming;
checks_after_input(w);
}
else
isAccurateZooming = false;
}
void DrawCamera::input_mouse_motion_callback(World& w, const InputManager::MouseMotionCallbackArgs& motion) {
if(!smoothMove.occurring && !isTouchTransforming) {
if(isAccurateZooming && startZoomVal != WorldScalar(0)) {
WorldScalar zoomFactor(std::pow(1.0 + w.main.conf.dragZoomSpeed, w.main.conf.flipZoomToolDirection ? motion.move.y() : -motion.move.y()));
if(zoomFactor < WorldScalar(0.000001))
zoomFactor = WorldScalar(0.000001);
c.scale(zoomFactor);
if(c.inverseScale < WorldScalar(0.0001))
c.inverseScale = WorldScalar(0.0001);
else {
WorldVec mVec = startZoomCameraPos - startZoomMousePos;
WorldScalar mX = static_cast<WorldScalar>(WorldMultiplier(c.inverseScale) / WorldMultiplier(startZoomVal));
c.pos = startZoomMousePos + mVec * mX;
}
checks_after_input(w);
}
else if(w.drawProg.controls.middleClickHeld || (w.drawProg.controls.leftClickHeld && w.drawProg.drawTool->get_type() == DrawingProgramToolType::PAN)) {
c.pos -= c.dir_from_space(motion.move);
checks_after_input(w);
}
}
}
void DrawCamera::input_mouse_wheel_callback(World& w, const InputManager::MouseWheelCallbackArgs& wheel) {
if(!smoothMove.occurring && !isTouchTransforming && wheel.tickAmount.y() && !w.main.g.gui.cursor_obstructed()) {
// Doesn't take tickAmount magnitude into account, since that results in scrolling that's way too fast on macOS
WorldVec mouseWorldPos = c.from_space(wheel.mousePos);
WorldScalar zoomFactor(1.0 + w.main.conf.scrollZoomSpeed);
if(zoomFactor < WorldScalar(0.000001))
zoomFactor = WorldScalar(0.000001);
if(zoomFactor != WorldScalar(0)) {
if(wheel.tickAmount.y() < 0)
zoomFactor = WorldScalar(1) / zoomFactor;
c.scale(zoomFactor);
if(c.inverseScale < WorldScalar(0.0001))
c.inverseScale = WorldScalar(0.0001);
else {
WorldVec mVec = c.pos - mouseWorldPos;
c.pos = mouseWorldPos + mVec / zoomFactor;
}
}
checks_after_input(w);
}
}
void DrawCamera::input_multi_finger_touch_callback(World& w, const InputManager::MultiFingerTouchCallbackArgs& touch) {
if(!smoothMove.occurring && !isAccurateZooming && !isTouchTransforming && touch.down) {
touchInitialPositions = touch.pos;
touchInitialC = c;
isTouchTransforming = true;
}
else
isTouchTransforming = false;
}
void DrawCamera::input_multi_finger_motion_callback(World& w, const InputManager::MultiFingerMotionCallbackArgs& motion) {
if(!smoothMove.occurring && !isAccurateZooming && isTouchTransforming) {
c = touchInitialC;
Vector2f initialCenter = (touchInitialPositions[0] + touchInitialPositions[1]) * 0.5f;
Vector2f newCenter = (motion.pos[0] + motion.pos[1]) * 0.5f;
c.pos -= c.dir_from_space(newCenter - initialCenter);
WorldVec newCenterWorld = c.from_space(newCenter);
float initialDistance = vec_distance(touchInitialPositions[0], touchInitialPositions[1]);
float newDistance = vec_distance(motion.pos[0], motion.pos[1]);
float scaleAmount = newDistance / initialDistance;
c.scale_about_double(newCenterWorld, scaleAmount);
Vector2f initialDiff = touchInitialPositions[0] - initialCenter;
float initialAngle = std::atan2(initialDiff.y(), initialDiff.x()) + std::numbers::pi;
Vector2f newDiff = motion.pos[0] - newCenter;
float newAngle = std::atan2(newDiff.y(), newDiff.x()) + std::numbers::pi;
float rotateAngle = initialAngle - newAngle;
rotateAngle = std::fmod(rotateAngle + std::numbers::pi, std::numbers::pi * 2.0f) - std::numbers::pi;
c.rotate_about(newCenterWorld, rotateAngle);
checks_after_input(w);
}
}
void DrawCamera::save_file(cereal::PortableBinaryOutputArchive& a, const World& w) const {
a(c, w.main.window.size.cast<float>().eval());
}
void DrawCamera::load_file(cereal::PortableBinaryInputArchive& a, VersionNumber version, World& w) {
CoordSpaceHelper coordsToJumpTo;
Vector2f windowSizeToJumpTo;
a(coordsToJumpTo, windowSizeToJumpTo);
smooth_move_to(w, coordsToJumpTo, windowSizeToJumpTo, true);
}
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