solvespace/src/draw.cpp at unmimalloc · vthriller/solvespace · GitHub

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//-----------------------------------------------------------------------------

// The root function to paint our graphics window, after setting up all the

// views and such appropriately. Also contains all the stuff to manage the

// selection.

//-----------------------------------------------------------------------------

#include "solvespace.h"

namespace SolveSpace {

bool GraphicsWindow::Selection::Equals(Selection *b) {

if(entity != b->entity) return false;

if(constraint != b->constraint) return false;

return true;

}

bool GraphicsWindow::Selection::IsEmpty() {

if(entity.v) return false;

if(constraint.v) return false;

return true;

}

bool GraphicsWindow::Selection::HasEndpoints() {

if(!entity.v) return false;

Entity *e = SK.GetEntity(entity);

return e->HasEndpoints();

}

void GraphicsWindow::Selection::Clear() {

entity.v = constraint.v = 0;

emphasized = false;

}

void GraphicsWindow::Selection::Draw(bool isHovered, Canvas *canvas) {

const Camera &camera = canvas->GetCamera();

std::vector<Vector> refs;

if(entity.v) {

Entity *e = SK.GetEntity(entity);

e->Draw(isHovered ? Entity::DrawAs::HOVERED :

Entity::DrawAs::SELECTED,

canvas);

if(emphasized) {

e->GetReferencePoints(&refs);

}

if(constraint.v) {

Constraint *c = SK.GetConstraint(constraint);

c->Draw(isHovered ? Constraint::DrawAs::HOVERED :

Constraint::DrawAs::SELECTED,

canvas);

if(emphasized) {

c->GetReferencePoints(camera, &refs);

}

if(emphasized && (constraint.v || entity.v)) {

// We want to emphasize this constraint or entity, by drawing a thick

// line from the top left corner of the screen to the reference point(s)

// of that entity or constraint.

Canvas::Stroke strokeEmphasis = {};

strokeEmphasis.layer = Canvas::Layer::FRONT;

strokeEmphasis.color = Style::Color(Style::HOVERED).WithAlpha(50);

strokeEmphasis.width = 40;

strokeEmphasis.unit = Canvas::Unit::PX;

Canvas::hStroke hcsEmphasis = canvas->GetStroke(strokeEmphasis);

Point2d topLeftScreen;

topLeftScreen.x = -(double)camera.width / 2;

topLeftScreen.y = (double)camera.height / 2;

Vector topLeft = camera.UnProjectPoint(topLeftScreen);

auto it = std::unique(refs.begin(), refs.end(),

[](const Vector &a, const Vector &b) { return a.Equals(b); });

refs.erase(it, refs.end());

for(const Vector &p : refs) {

canvas->DrawLine(topLeft, p, hcsEmphasis);

}

void GraphicsWindow::ClearSelection() {

selection.Clear();

SS.ScheduleShowTW();

Invalidate();

}

void GraphicsWindow::ClearNonexistentSelectionItems() {

bool change = false;

Selection *s;

selection.ClearTags();

for(s = selection.First(); s; s = selection.NextAfter(s)) {

if(s->constraint.v && !(SK.constraint.FindByIdNoOops(s->constraint))) {

s->tag = 1;

change = true;

}

if(s->entity.v && !(SK.entity.FindByIdNoOops(s->entity))) {

s->tag = 1;

change = true;

}

selection.RemoveTagged();

if(change) Invalidate();

}

//-----------------------------------------------------------------------------

// Is this entity/constraint selected?

//-----------------------------------------------------------------------------

bool GraphicsWindow::IsSelected(hEntity he) {

Selection s = {};

s.entity = he;

return IsSelected(&s);

}

bool GraphicsWindow::IsSelected(Selection *st) {

Selection *s;

for(s = selection.First(); s; s = selection.NextAfter(s)) {

if(s->Equals(st)) {

return true;

}

return false;

}

//-----------------------------------------------------------------------------

// Unselect an item, if it is selected. We can either unselect just that item,

// or also unselect any coincident points. The latter is useful if the user

// somehow selects two coincident points (like with select all), because it

// would otherwise be impossible to de-select the lower of the two.

//-----------------------------------------------------------------------------

void GraphicsWindow::MakeUnselected(hEntity he, bool coincidentPointTrick) {

Selection stog = {};

stog.entity = he;

MakeUnselected(&stog, coincidentPointTrick);

}

void GraphicsWindow::MakeUnselected(Selection *stog, bool coincidentPointTrick){

if(stog->IsEmpty()) return;

Selection *s;

// If an item was selected, then we just un-select it.

selection.ClearTags();

for(s = selection.First(); s; s = selection.NextAfter(s)) {

if(s->Equals(stog)) {

s->tag = 1;

}

// If two points are coincident, then it's impossible to hover one of

// them. But make sure to deselect both, to avoid mysterious seeming

// inability to deselect if the bottom one did somehow get selected.

if(stog->entity.v && coincidentPointTrick) {

Entity *e = SK.GetEntity(stog->entity);

if(e->IsPoint()) {

Vector ep = e->PointGetNum();

for(s = selection.First(); s; s = selection.NextAfter(s)) {

if(!s->entity.v) continue;

if(s->entity == stog->entity)

continue;

Entity *se = SK.GetEntity(s->entity);

if(!se->IsPoint()) continue;

if(ep.Equals(se->PointGetNum())) {

s->tag = 1;

}

selection.RemoveTagged();

}

//-----------------------------------------------------------------------------

// Select an item, if it isn't selected already.

//-----------------------------------------------------------------------------

void GraphicsWindow::MakeSelected(hEntity he) {

Selection stog = {};

stog.entity = he;

MakeSelected(&stog);

}

void GraphicsWindow::MakeSelected(hConstraint hc) {

Selection stog = {};

stog.constraint = hc;

MakeSelected(&stog);

}

void GraphicsWindow::MakeSelected(Selection *stog) {

if(stog->IsEmpty()) return;

if(IsSelected(stog)) return;

if(stog->entity.v != 0 && SK.GetEntity(stog->entity)->IsFace()) {

// In the interest of speed for the triangle drawing code,

// only MAX_SELECTABLE_FACES faces may be selected at a time.

unsigned int c = 0;

Selection *s;

selection.ClearTags();

for(s = selection.First(); s; s = selection.NextAfter(s)) {

hEntity he = s->entity;

if(he.v != 0 && SK.GetEntity(he)->IsFace()) {

c++;

// See also GraphicsWindow::GroupSelection "if(e->IsFace())"

// and Group::DrawMesh "case DrawMeshAs::SELECTED:"

if(c >= MAX_SELECTABLE_FACES) s->tag = 1;

}

selection.RemoveTagged();

}

selection.Add(stog);

}

//-----------------------------------------------------------------------------

// Select everything that lies within the marquee view-aligned rectangle.

//-----------------------------------------------------------------------------

void GraphicsWindow::SelectByMarquee() {

Point2d marqueePoint = ProjectPoint(orig.marqueePoint);

BBox marqueeBBox = BBox::From({marqueePoint.x, marqueePoint.y, VERY_NEGATIVE},

{orig.mouse.x, orig.mouse.y, VERY_POSITIVE});

for(Entity &e : SK.entity) {

if(e.group != SS.GW.activeGroup) continue;

if(e.IsFace() || e.IsDistance()) continue;

if(!e.IsVisible()) continue;

bool entityHasBBox;

BBox entityBBox = e.GetOrGenerateScreenBBox(&entityHasBBox);

if(entityHasBBox && entityBBox.Overlaps(marqueeBBox)) {

if(e.type == Entity::Type::LINE_SEGMENT) {

Vector p0 = SS.GW.ProjectPoint3(e.EndpointStart());

Vector p1 = SS.GW.ProjectPoint3(e.EndpointFinish());

if((!marqueeBBox.Contains({p0.x, p0.y}, 0)) &&

(!marqueeBBox.Contains({p1.x, p1.y}, 0))) {

// The selection marquee does not contain either of the line segment end points.

// This means that either the segment is entirely outside the marquee or that

// it intersects it. Check if it does...

if(!Vector::BoundingBoxIntersectsLine(marqueeBBox.maxp, marqueeBBox.minp, p0,

p1, true)) {

// ... it does not so it is outside.

continue;

}

MakeSelected(e.h);

}

//-----------------------------------------------------------------------------

// Sort the selection according to various criteria: the entities and

// constraints separately, counts of certain types of entities (circles,

// lines, etc.), and so on.

//-----------------------------------------------------------------------------

void GraphicsWindow::GroupSelection() {

gs = {};

int i;

for(i = 0; i < selection.n; i++) {

Selection *s = &(selection[i]);

if(s->entity.v) {

(gs.n)++;

Entity *e = SK.entity.FindById(s->entity);

if(e->IsStylable()) gs.stylables++;

// A list of points, and a list of all entities that aren't points.

if(e->IsPoint()) {

gs.points++;

gs.point.push_back(s->entity);

} else {

gs.entities++;

gs.entity.push_back(s->entity);

}

// And an auxiliary list of normals, including normals from

// workplanes.

if(e->IsNormal()) {

gs.anyNormals++;

gs.anyNormal.push_back(s->entity);

} else if(e->IsWorkplane()) {

gs.anyNormals++;

gs.anyNormal.push_back(e->Normal()->h);

}

// And of vectors (i.e., stuff with a direction to constrain)

if(e->HasVector()) {

gs.vectors++;

gs.vector.push_back(s->entity);

}

// Faces (which are special, associated/drawn with triangles)

if(e->IsFace()) {

gs.faces++;

gs.face.push_back(s->entity);

}

if(e->HasEndpoints()) {

(gs.withEndpoints)++;

}

// And some aux counts too

switch(e->type) {

case Entity::Type::WORKPLANE: (gs.workplanes)++; break;

case Entity::Type::LINE_SEGMENT: (gs.lineSegments)++; break;

case Entity::Type::CUBIC: (gs.cubics)++; break;

case Entity::Type::CUBIC_PERIODIC: (gs.periodicCubics)++; break;

case Entity::Type::ARC_OF_CIRCLE:

(gs.circlesOrArcs)++;

(gs.arcs)++;

break;

case Entity::Type::CIRCLE: (gs.circlesOrArcs)++; break;

default: break;

}

if(s->constraint.v) {

gs.constraints++;

gs.constraint.push_back(s->constraint);

Constraint *c = SK.GetConstraint(s->constraint);

if(c->IsStylable()) gs.stylables++;

if(c->HasLabel()) gs.constraintLabels++;

}

Camera GraphicsWindow::GetCamera() const {

Camera camera = {};

if(window) {

window->GetContentSize(&camera.width, &camera.height);

camera.pixelRatio = window->GetDevicePixelRatio();

camera.gridFit = (window->GetDevicePixelRatio() == 1);

} else { // solvespace-cli

camera.width = 297.0; // A4? Whatever...

camera.height = 210.0;

camera.pixelRatio = 1.0;

camera.gridFit = camera.pixelRatio == 1.0;

}

camera.offset = offset;

camera.projUp = projUp;

camera.projRight = projRight;

camera.scale = scale;

camera.tangent = SS.CameraTangent();

return camera;

}

Lighting GraphicsWindow::GetLighting() const {

Lighting lighting = {};

lighting.backgroundColor = SS.backgroundColor;

lighting.ambientIntensity = SS.ambientIntensity;

lighting.lightIntensity[0] = SS.lightIntensity[0];

lighting.lightIntensity[1] = SS.lightIntensity[1];

lighting.lightDirection[0] = SS.lightDir[0];

lighting.lightDirection[1] = SS.lightDir[1];

return lighting;

}

GraphicsWindow::Selection GraphicsWindow::ChooseFromHoverToSelect() {

Selection sel = {};

if(hoverList.IsEmpty())

return sel;

Group *activeGroup = SK.GetGroup(SS.GW.activeGroup);

int bestOrder = -1;

int bestZIndex = 0;

double bestDepth = VERY_POSITIVE;

for(const Hover &hov : hoverList) {

hGroup hg = {};

if(hov.selection.entity.v != 0) {

hg = SK.GetEntity(hov.selection.entity)->group;

} else if(hov.selection.constraint.v != 0) {

hg = SK.GetConstraint(hov.selection.constraint)->group;

}

Group *g = SK.GetGroup(hg);

if(g->order > activeGroup->order) continue;

if(bestOrder != -1 && (bestOrder > g->order || bestZIndex > hov.zIndex)) continue;

// we have hov.zIndex is >= best and hov.group is >= best (but not > active group)

if(hov.depth > bestDepth && bestOrder == g->order && bestZIndex == hov.zIndex) continue;

bestOrder = g->order;

bestZIndex = hov.zIndex;

bestDepth = hov.depth;

sel = hov.selection;

}

return sel;

}

// This uses the same logic as hovering and static entity selection

// but ignores points known not to be draggable

GraphicsWindow::Selection GraphicsWindow::ChooseFromHoverToDrag() {

Selection sel = {};

if(hoverList.IsEmpty())

return sel;

Group *activeGroup = SK.GetGroup(SS.GW.activeGroup);

int bestOrder = -1;

int bestZIndex = 0;

double bestDepth = VERY_POSITIVE;

for(const Hover &hov : hoverList) {

hGroup hg = {};

if(hov.selection.entity.v != 0) {

Entity *e = SK.GetEntity(hov.selection.entity);

if (!e->CanBeDragged()) continue;

hg = e->group;

} else if(hov.selection.constraint.v != 0) {

hg = SK.GetConstraint(hov.selection.constraint)->group;

}

Group *g = SK.GetGroup(hg);

if(g->order > activeGroup->order) continue;

if(bestOrder != -1 && (bestOrder > g->order || bestZIndex > hov.zIndex)) continue;

// we have hov.zIndex is >= best and hov.group is >= best (but not > active group)

if(hov.depth > bestDepth && bestOrder == g->order && bestZIndex == hov.zIndex) continue;

bestOrder = g->order;

bestZIndex = hov.zIndex;

sel = hov.selection;

}

return sel;

}

void GraphicsWindow::HitTestMakeSelection(Point2d mp) {

hoverList = {};

Selection sel = {};

// Did the view projection change? If so, invalidate bounding boxes.

if(!offset.EqualsExactly(cached.offset) ||

!projRight.EqualsExactly(cached.projRight) ||

!projUp.EqualsExactly(cached.projUp) ||

EXACT(scale != cached.scale)) {

cached.offset = offset;

cached.projRight = projRight;

cached.projUp = projUp;

cached.scale = scale;

for(Entity &e : SK.entity) {

e.screenBBoxValid = false;

}

ObjectPicker canvas = {};

canvas.camera = GetCamera();

canvas.selRadius = 10.0;

canvas.point = mp;

canvas.maxZIndex = -1;

// Always do the entities; we might be dragging something that should

// be auto-constrained, and we need the hover for that.

for(Entity &e : SK.entity) {

if(!e.IsVisible()) continue;

// If faces aren't selectable, image entities aren't either.

if(e.type == Entity::Type::IMAGE && !showFaces) continue;

// Don't hover whatever's being dragged.

if(IsFromPending(e.h.request())) {

// The one exception is when we're creating a new cubic; we

// want to be able to hover the first point, because that's

// how we turn it into a periodic spline.

if(!e.IsPoint()) continue;

if(!e.h.isFromRequest()) continue;

Request *r = SK.GetRequest(e.h.request());

if(r->type != Request::Type::CUBIC) continue;

if(r->extraPoints < 2) continue;

if(e.h.v != r->h.entity(1).v) continue;

}

if(canvas.Pick([&]{ e.Draw(Entity::DrawAs::DEFAULT, &canvas); })) {

Hover hov = {};

hov.distance = canvas.minDistance;

hov.zIndex = canvas.maxZIndex;

hov.depth = canvas.minDepth;

hov.selection.entity = e.h;

hoverList.Add(&hov);

}

// The constraints and faces happen only when nothing's in progress.

if(pending.operation == Pending::NONE) {

// Constraints

for(Constraint &c : SK.constraint) {

if(canvas.Pick([&]{ c.Draw(Constraint::DrawAs::DEFAULT, &canvas); })) {

Hover hov = {};

hov.distance = canvas.minDistance;

hov.zIndex = canvas.maxZIndex;

hov.selection.constraint = c.h;

hoverList.Add(&hov);

}

std::sort(hoverList.begin(), hoverList.end(),

[](const Hover &a, const Hover &b) {

if(a.zIndex == b.zIndex) return a.distance < b.distance;

return a.zIndex > b.zIndex;

});

sel = ChooseFromHoverToSelect();

if(pending.operation == Pending::NONE) {

// Faces, from the triangle mesh; these are lowest priority

if(sel.constraint.v == 0 && sel.entity.v == 0 && showShaded && showFaces) {

Group *g = SK.GetGroup(activeGroup);

SMesh *m = &(g->displayMesh);

uint32_t v = m->FirstIntersectionWith(mp);

if(v) {

sel.entity.v = v;

Hover hov = {};

hov.selection = sel;

hoverList.Add(&hov);

}

canvas.Clear();

if(!sel.Equals(&hover)) {

hover = sel;

Invalidate();

}

//-----------------------------------------------------------------------------

// Project a point in model space to screen space, exactly as gl would; return

// units are pixels.

//-----------------------------------------------------------------------------

Point2d GraphicsWindow::ProjectPoint(Vector p) {

Vector p3 = ProjectPoint3(p);

Point2d p2 = { p3.x, p3.y };

return p2;

}

//-----------------------------------------------------------------------------

// Project a point in model space to screen space, exactly as gl would; return

// units are pixels. The z coordinate is also returned, also in pixels.

//-----------------------------------------------------------------------------

Vector GraphicsWindow::ProjectPoint3(Vector p) {

double w;

Vector r = ProjectPoint4(p, &w);

return r.ScaledBy(scale/w);

}

//-----------------------------------------------------------------------------

// Project a point in model space halfway into screen space. The scale is

// not applied, and the perspective divide isn't applied; instead the w

// coordinate is returned separately.

//-----------------------------------------------------------------------------

Vector GraphicsWindow::ProjectPoint4(Vector p, double *w) {

p = p.Plus(offset);

Vector r;

r.x = p.Dot(projRight);

r.y = p.Dot(projUp);

r.z = p.Dot(projUp.Cross(projRight));

*w = 1 + r.z*SS.CameraTangent()*scale;

return r;

}

//-----------------------------------------------------------------------------

// Return a point in the plane parallel to the screen and through the offset,

// that projects onto the specified (x, y) coordinates.

//-----------------------------------------------------------------------------

Vector GraphicsWindow::UnProjectPoint(Point2d p) {

Vector orig = offset.ScaledBy(-1);

// Note that we ignoring the effects of perspective. Since our returned

// point has the same component normal to the screen as the offset, it

// will have z = 0 after the rotation is applied, thus w = 1. So this is

// correct.

orig = orig.Plus(projRight.ScaledBy(p.x / scale)).Plus(

projUp. ScaledBy(p.y / scale));

return orig;

}

Vector GraphicsWindow::UnProjectPoint3(Vector p) {

p.z = p.z / (scale - p.z * SS.CameraTangent() * scale);

double w = 1 + p.z * SS.CameraTangent() * scale;

p.x *= w / scale;

p.y *= w / scale;

Vector orig = offset.ScaledBy(-1);

orig = orig.Plus(projRight.ScaledBy(p.x)).Plus(

projUp. ScaledBy(p.y).Plus(

projRight.Cross(projUp). ScaledBy(p.z)));

return orig;

}

void GraphicsWindow::NormalizeProjectionVectors() {

if(projRight.Magnitude() < LENGTH_EPS) {

projRight = {1, 0, 0};

}

Vector norm = projRight.Cross(projUp);

// If projRight and projUp somehow ended up parallel, then pick an

// arbitrary projUp normal to projRight.

if(norm.Magnitude() < LENGTH_EPS) {

norm = projRight.Normal(0);

}

projUp = norm.Cross(projRight);

projUp = projUp.WithMagnitude(1);

projRight = projRight.WithMagnitude(1);

}

void GraphicsWindow::DrawSnapGrid(Canvas *canvas) {

if(!LockedInWorkplane()) return;

const Camera &camera = canvas->GetCamera();

double width = camera.width,

height = camera.height;

hEntity he = ActiveWorkplane();

EntityBase *wrkpl = SK.GetEntity(he),

*norm = wrkpl->Normal();

Vector n = projUp.Cross(projRight);

Vector wu, wv, wn, wp;

wp = SK.GetEntity(wrkpl->point[0])->PointGetNum();

wu = norm->NormalU();

wv = norm->NormalV();

wn = norm->NormalN();

double g = SS.gridSpacing;

double umin = VERY_POSITIVE, umax = VERY_NEGATIVE,

vmin = VERY_POSITIVE, vmax = VERY_NEGATIVE;

int a;

for(a = 0; a < 4; a++) {

// Ideally, we would just do +/- half the width and height; but

// allow some extra slop for rounding.

Vector horiz = projRight.ScaledBy((0.6*width)/scale + 2*g),

vert = projUp. ScaledBy((0.6*height)/scale + 2*g);

if(a == 2 || a == 3) horiz = horiz.ScaledBy(-1);

if(a == 1 || a == 3) vert = vert. ScaledBy(-1);

Vector tp = horiz.Plus(vert).Minus(offset);

// Project the point into our grid plane, normal to the screen

// (not to the grid plane). If the plane is on edge then this is

// impossible so don't try to draw the grid.

bool parallel;

Vector tpp = Vector::AtIntersectionOfPlaneAndLine(

wn, wn.Dot(wp),

tp, tp.Plus(n),

&parallel);

if(parallel) return;

tpp = tpp.Minus(wp);

double uu = tpp.Dot(wu),

vv = tpp.Dot(wv);

umin = min(uu, umin);

umax = max(uu, umax);

vmin = min(vv, vmin);

vmax = max(vv, vmax);

}

int i, j, i0, i1, j0, j1;

i0 = (int)(umin / g);

i1 = (int)(umax / g);

j0 = (int)(vmin / g);

j1 = (int)(vmax / g);

if(i0 > i1 || i1 - i0 > 400) return;

if(j0 > j1 || j1 - j0 > 400) return;

Canvas::Stroke stroke = {};

stroke.layer = Canvas::Layer::BACK;

stroke.color = Style::Color(Style::DATUM).WithAlpha(75);

stroke.unit = Canvas::Unit::PX;

stroke.width = 1.0f;

Canvas::hStroke hcs = canvas->GetStroke(stroke);

for(i = i0 + 1; i < i1; i++) {

canvas->DrawLine(wp.Plus(wu.ScaledBy(i*g)).Plus(wv.ScaledBy(j0*g)),

wp.Plus(wu.ScaledBy(i*g)).Plus(wv.ScaledBy(j1*g)),

hcs);

}

for(j = j0 + 1; j < j1; j++) {

canvas->DrawLine(wp.Plus(wu.ScaledBy(i0*g)).Plus(wv.ScaledBy(j*g)),

wp.Plus(wu.ScaledBy(i1*g)).Plus(wv.ScaledBy(j*g)),

hcs);

}

void GraphicsWindow::DrawEntities(Canvas *canvas, bool persistent) {

for(Entity &e : SK.entity) {

if(persistent == (e.IsNormal() || e.IsWorkplane())) continue;

switch(SS.GW.drawOccludedAs) {

case DrawOccludedAs::VISIBLE:

e.Draw(Entity::DrawAs::OVERLAY, canvas);

break;

case DrawOccludedAs::STIPPLED:

e.Draw(Entity::DrawAs::HIDDEN, canvas);

/* fallthrough */

case DrawOccludedAs::INVISIBLE:

e.Draw(Entity::DrawAs::DEFAULT, canvas);

break;

}

void GraphicsWindow::DrawPersistent(Canvas *canvas) {

// Draw the active group; this does stuff like the mesh and edges.

SK.GetGroup(activeGroup)->Draw(canvas);

// Now draw the entities that don't change with viewport.

DrawEntities(canvas, /*persistent=*/true);

// Draw filled paths in all groups, when those filled paths were requested

// specially by assigning a style with a fill color, or when the filled

// paths are just being filled by default. This should go last, to make

// the transparency work.

for(hGroup hg : SK.groupOrder) {

Group *g = SK.GetGroup(hg);

if(!(g->IsVisible())) continue;

g->DrawFilledPaths(canvas);

}

void GraphicsWindow::Draw(Canvas *canvas) {

const Camera &camera = canvas->GetCamera();

// Nasty case when we're reloading the linked files; could be that

// we get an error, so a dialog pops up, and a message loop starts, and

// we have to get called to paint ourselves. If the sketch is screwed

// up, then we could trigger an oops trying to draw.

if(!SS.allConsistent) return;

if(showSnapGrid) DrawSnapGrid(canvas);

// Draw all the things that don't change when we rotate.

if(persistentCanvas != NULL) {

if(persistentDirty) {

persistentDirty = false;

persistentCanvas->Clear();

DrawPersistent(&*persistentCanvas);

persistentCanvas->Finalize();

}

persistentCanvas->Draw();

} else {

DrawPersistent(canvas);

}

// Draw the entities that do change with viewport.

DrawEntities(canvas, /*persistent=*/false);

// Draw the polygon errors.

if(SS.checkClosedContour) {

SK.GetGroup(activeGroup)->DrawPolyError(canvas);

}

// Draw the constraints

for(Constraint &c : SK.constraint) {

c.Draw(Constraint::DrawAs::DEFAULT, canvas);

}

// Draw areas

if(SS.showContourAreas) {

for(hGroup hg : SK.groupOrder) {

Group *g = SK.GetGroup(hg);

if(g->h != activeGroup) continue;

if(!(g->IsVisible())) continue;

g->DrawContourAreaLabels(canvas);

}

// Draw the "pending" constraint, i.e. a constraint that would be

// placed on a line that is almost horizontal or vertical.

if(SS.GW.pending.operation == Pending::DRAGGING_NEW_LINE_POINT &&

SS.GW.pending.hasSuggestion) {

Constraint c = {};

c.group = SS.GW.activeGroup;

c.workplane = SS.GW.ActiveWorkplane();

c.type = SS.GW.pending.suggestion;

c.entityA = SS.GW.pending.request.entity(0);

c.Draw(Constraint::DrawAs::DEFAULT, canvas);

}

Canvas::Stroke strokeAnalyze = Style::Stroke(Style::ANALYZE);

strokeAnalyze.layer = Canvas::Layer::FRONT;

Canvas::hStroke hcsAnalyze = canvas->GetStroke(strokeAnalyze);

// Draw the traced path, if one exists

SEdgeList tracedEdges = {};

SS.traced.path.MakeEdgesInto(&tracedEdges);

canvas->DrawEdges(tracedEdges, hcsAnalyze);

tracedEdges.Clear();

Canvas::Stroke strokeError = Style::Stroke(Style::DRAW_ERROR);

strokeError.layer = Canvas::Layer::FRONT;

strokeError.width = 12;

Canvas::hStroke hcsError = canvas->GetStroke(strokeError);

// And the naked edges, if the user did Analyze -> Show Naked Edges.

canvas->DrawEdges(SS.nakedEdges, hcsError);

// Then redraw whatever the mouse is hovering over, highlighted.

hover.Draw(/*isHovered=*/true, canvas);

SK.GetGroup(activeGroup)->DrawMesh(Group::DrawMeshAs::HOVERED, canvas);

// And finally draw the selection, same mechanism.

for(Selection *s = selection.First(); s; s = selection.NextAfter(s)) {

s->Draw(/*isHovered=*/false, canvas);

}

SK.GetGroup(activeGroup)->DrawMesh(Group::DrawMeshAs::SELECTED, canvas);

Canvas::Stroke strokeDatum = Style::Stroke(Style::DATUM);

strokeDatum.unit = Canvas::Unit::PX;

strokeDatum.layer = Canvas::Layer::FRONT;

strokeDatum.width = 1;

Canvas::hStroke hcsDatum = canvas->GetStroke(strokeDatum);

// An extra line, used to indicate the origin when rotating within the

// plane of the monitor.

if(SS.extraLine.draw) {

canvas->DrawLine(SS.extraLine.ptA, SS.extraLine.ptB, hcsDatum);

}

if(SS.centerOfMass.draw && !SS.centerOfMass.dirty) {

Vector p = SS.centerOfMass.position;

Vector u = camera.projRight;

Vector v = camera.projUp;

const double size = 10.0;

const int subdiv = 16;

double h = Style::DefaultTextHeight() / camera.scale;

std::string s =

SS.MmToStringSI(p.x) + ", " +

SS.MmToStringSI(p.y) + ", " +

SS.MmToStringSI(p.z);

canvas->DrawVectorText(s.c_str(), h,

p.Plus(u.ScaledBy((size + 5.0)/scale)).Minus(v.ScaledBy(h / 2.0)),

u, v, hcsDatum);

u = u.WithMagnitude(size / scale);

v = v.WithMagnitude(size / scale);

canvas->DrawLine(p.Minus(u), p.Plus(u), hcsDatum);

canvas->DrawLine(p.Minus(v), p.Plus(v), hcsDatum);

Vector prev;

for(int i = 0; i <= subdiv; i++) {

double a = (double)i / subdiv * 2.0 * PI;

Vector point = p.Plus(u.ScaledBy(cos(a))).Plus(v.ScaledBy(sin(a)));

if(i > 0) {

canvas->DrawLine(point, prev, hcsDatum);

}

prev = point;

}

// A note to indicate the origin in the just-exported file.

if(SS.justExportedInfo.draw) {

Vector p, u, v;

if(SS.justExportedInfo.showOrigin) {

p = SS.justExportedInfo.pt,

u = SS.justExportedInfo.u,

v = SS.justExportedInfo.v;

} else {

p = camera.offset.ScaledBy(-1);

u = camera.projRight;

v = camera.projUp;

}

canvas->DrawVectorText("previewing exported geometry; press Esc to return",

Style::DefaultTextHeight() / camera.scale,

p.Plus(u.ScaledBy(10/scale)).Plus(v.ScaledBy(10/scale)), u, v,

hcsDatum);

if(SS.justExportedInfo.showOrigin) {

Vector um = p.Plus(u.WithMagnitude(-15/scale)),

up = p.Plus(u.WithMagnitude(30/scale)),

vm = p.Plus(v.WithMagnitude(-15/scale)),

vp = p.Plus(v.WithMagnitude(30/scale));

canvas->DrawLine(um, up, hcsDatum);

canvas->DrawLine(vm, vp, hcsDatum);

canvas->DrawVectorText("(x, y) = (0, 0) for file just exported",

Style::DefaultTextHeight() / camera.scale,

p.Plus(u.ScaledBy(40/scale)).Plus(

v.ScaledBy(-(Style::DefaultTextHeight())/scale)), u, v,

hcsDatum);

}

void GraphicsWindow::Paint() {

ssassert(window != NULL && canvas != NULL,

"Cannot paint without window and canvas");

havePainted = true;

Camera camera = GetCamera();

Lighting lighting = GetLighting();

if(!SS.ActiveGroupsOkay()) {

// Draw a different background whenever we're having solve problems.

RgbaColor bgColor = Style::Color(Style::DRAW_ERROR);

bgColor = RgbaColor::FromFloat(0.4f*bgColor.redF(),

0.4f*bgColor.greenF(),

0.4f*bgColor.blueF());

lighting.backgroundColor = bgColor;

// And show the text window, which has info to debug it

ForceTextWindowShown();

}

canvas->SetLighting(lighting);

canvas->SetCamera(camera);

canvas->StartFrame();

// Draw the 3d objects.

Draw(canvas.get());

canvas->FlushFrame();

// Draw the 2d UI overlay.

camera.LoadIdentity();

camera.offset.x = -(double)camera.width / 2.0;

camera.offset.y = -(double)camera.height / 2.0;

canvas->SetCamera(camera);

UiCanvas uiCanvas = {};

uiCanvas.canvas = canvas;

// If a marquee selection is in progress, then draw the selection

// rectangle, as an outline and a transparent fill.

if(pending.operation == Pending::DRAGGING_MARQUEE) {

Point2d begin = ProjectPoint(orig.marqueePoint);

uiCanvas.DrawRect((int)orig.mouse.x + (int)camera.width / 2,

(int)begin.x + (int)camera.width / 2,

(int)orig.mouse.y + (int)camera.height / 2,

(int)begin.y + (int)camera.height / 2,

/*fillColor=*/Style::Color(Style::HOVERED).WithAlpha(25),

/*outlineColor=*/Style::Color(Style::HOVERED));

}

// If we've had a screenshot requested, take it now, before the UI is overlaid.

if(!SS.screenshotFile.IsEmpty()) {

FILE *f = OpenFile(SS.screenshotFile, "wb");

if(!f || !canvas->ReadFrame()->WritePng(f, /*flip=*/true)) {

Error("Couldn't write to '%s'", SS.screenshotFile.raw.c_str());

}

if(f) fclose(f);

SS.screenshotFile.Clear();

}

// And finally the toolbar.

if(SS.showToolbar) {

canvas->SetCamera(camera);

ToolbarDraw(&uiCanvas);

}

canvas->FlushFrame();

canvas->FinishFrame();

canvas->Clear();

}

void GraphicsWindow::Invalidate(bool clearPersistent) {

if(window) {

if(clearPersistent) {

persistentDirty = true;

}

window->Invalidate();

}

} // namespace SolveSpace

solvespace/src/draw.cpp at unmimalloc · vthriller/solvespace · GitHub

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