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#123 Handle drag position (done)
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@ducphamhong
ducphamhong committed May 22, 2021
1 parent 6022c99 commit 5274658
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Showing 4 changed files with 171 additions and 59 deletions.
205 changes: 151 additions & 54 deletions Projects/Editor/Source/EditorComponents/Handles/CHandlesRenderer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,9 @@ namespace Skylicht
CHandlesRenderer::CHandlesRenderer() :
m_screenFactor(1.0f),
m_allowAxisFlip(true),
m_camera(NULL)
m_camera(NULL),
m_mouseDown(false),
m_mouseState(0)
{
m_data = new CHandlesData();
m_data->LineBuffer->getMaterial().ZBuffer = ECFN_DISABLED;
Expand Down Expand Up @@ -110,15 +112,15 @@ namespace Skylicht

CCamera* camera = entityManager->getCamera();

m_screenFactor = 0.2f / getSegmentLengthClipSpace(core::vector3df(), cameraRight, camera);

// Draw position axis
CHandles* handles = CHandles::getInstance();
if (handles->isHandlePosition())
{
const core::vector3df& pos = handles->getHandlePosition();

drawTranslateGizmo(pos, cameraLook, camera);
m_screenFactor = 0.2f / getSegmentLengthClipSpace(pos, pos + cameraRight, camera);

drawTranslateGizmo(pos, cameraPos, camera);
//drawRotationGizmo(pos, cameraPos);
//drawScaleGizmo(pos, cameraLook, cameraUp, camera);
}
Expand Down Expand Up @@ -167,7 +169,7 @@ namespace Skylicht
core::vector3df dirAxis, dirPlaneX, dirPlaneY;
bool belowAxisLimit, belowPlaneLimit;

computeTripodAxisAndVisibility(i, dirAxis, dirPlaneX, dirPlaneY, belowAxisLimit, belowPlaneLimit, camera);
computeTripodAxisAndVisibility(i, pos, dirAxis, dirPlaneX, dirPlaneY, belowAxisLimit, belowPlaneLimit, camera);

if (belowAxisLimit)
{
Expand All @@ -178,16 +180,15 @@ namespace Skylicht
m_data->addLine(m_scaleAxis[i].start, m_scaleAxis[i].end, m_hoverOnAxis[i] ? m_selectionColor : m_directionColor[i]);

// draw quad
float arrowSize1 = m_screenFactor * 0.1f;
float arrowSize2 = m_screenFactor * 0.05f;
float size = m_screenFactor * 0.05f;

core::vector3df side = cameraUp.crossProduct(cameraLook);
side.normalize();

core::vector3df a = pos + dirAxis * m_screenFactor;

core::vector3df sideQuad = side * arrowSize2;
core::vector3df upQuad = cameraUp * arrowSize2;
core::vector3df sideQuad = side * size;
core::vector3df upQuad = cameraUp * size;

core::vector3df v1, v2, v3, v4;
v1.set(
Expand All @@ -210,13 +211,13 @@ namespace Skylicht
a.Y - sideQuad.Y - upQuad.Y,
a.Z - sideQuad.Z - upQuad.Z
);
core::vector3df arrow[] = { v1, v2, v3, v4 };
m_data->addPolygonFill(arrow, 4, m_hoverOnAxis[i] ? m_selectionColor : m_directionColor[i]);
core::vector3df quad[] = { v1, v2, v3, v4 };
m_data->addPolygonFill(quad, 4, m_hoverOnAxis[i] ? m_selectionColor : m_directionColor[i]);
}
}
}

void CHandlesRenderer::drawTranslateGizmo(const core::vector3df& pos, const core::vector3df& cameraLook, CCamera* camera)
void CHandlesRenderer::drawTranslateGizmo(const core::vector3df& pos, const core::vector3df& cameraPos, CCamera* camera)
{
float quadMin = 0.1f;
float quadMax = 0.4f;
Expand All @@ -233,7 +234,7 @@ namespace Skylicht
core::vector3df dirAxis, dirPlaneX, dirPlaneY;
bool belowAxisLimit, belowPlaneLimit;

computeTripodAxisAndVisibility(i, dirAxis, dirPlaneX, dirPlaneY, belowAxisLimit, belowPlaneLimit, camera);
computeTripodAxisAndVisibility(i, pos, dirAxis, dirPlaneX, dirPlaneY, belowAxisLimit, belowPlaneLimit, camera);

if (belowAxisLimit)
{
Expand All @@ -248,7 +249,10 @@ namespace Skylicht
float arrowSize1 = m_screenFactor * 0.1f;
float arrowSize2 = m_screenFactor * 0.05f;

core::vector3df side = dirAxis.crossProduct(cameraLook);
core::vector3df look = cameraPos - pos;
look.normalize();

core::vector3df side = dirAxis.crossProduct(look);
side.normalize();

core::vector3df a = pos + dirAxis * m_screenFactor;
Expand All @@ -264,7 +268,7 @@ namespace Skylicht
core::vector3df planeLine[4];
for (int j = 0; j < 4; j++)
{
planeLine[j] = (dirPlaneX * quad[j].X + dirPlaneY * quad[j].Y) * m_screenFactor;
planeLine[j] = pos + (dirPlaneX * quad[j].X + dirPlaneY * quad[j].Y) * m_screenFactor;

// save the position
m_translsatePlane[i].Point[j] = planeLine[j];
Expand Down Expand Up @@ -343,20 +347,20 @@ namespace Skylicht
}

// References: https://github.com/CedricGuillemet/ImGuizmo/blob/master/ImGuizmo.cpp
void CHandlesRenderer::computeTripodAxisAndVisibility(int axisIndex, core::vector3df& dirAxis, core::vector3df& dirPlaneX, core::vector3df& dirPlaneY, bool& belowAxisLimit, bool& belowPlaneLimit, CCamera* camera)
void CHandlesRenderer::computeTripodAxisAndVisibility(int axisIndex, const core::vector3df& origin, core::vector3df& dirAxis, core::vector3df& dirPlaneX, core::vector3df& dirPlaneY, bool& belowAxisLimit, bool& belowPlaneLimit, CCamera* camera)
{
dirAxis = m_directionUnary[axisIndex];
dirPlaneX = m_directionUnary[(axisIndex + 1) % 3];
dirPlaneY = m_directionUnary[(axisIndex + 2) % 3];

float lenDir = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), dirAxis, camera);
float lenDirMinus = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), -dirAxis, camera);
float lenDir = getSegmentLengthClipSpace(origin, origin + dirAxis, camera);
float lenDirMinus = getSegmentLengthClipSpace(origin, origin - dirAxis, camera);

float lenDirPlaneX = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), dirPlaneX, camera);
float lenDirMinusPlaneX = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), -dirPlaneX, camera);
float lenDirPlaneX = getSegmentLengthClipSpace(origin, origin + dirPlaneX, camera);
float lenDirMinusPlaneX = getSegmentLengthClipSpace(origin, origin - dirPlaneX, camera);

float lenDirPlaneY = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), dirPlaneY, camera);
float lenDirMinusPlaneY = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), -dirPlaneY, camera);
float lenDirPlaneY = getSegmentLengthClipSpace(origin, origin + dirPlaneY, camera);
float lenDirMinusPlaneY = getSegmentLengthClipSpace(origin, origin - dirPlaneY, camera);

// For readability
bool& allowFlip = m_allowAxisFlip;
Expand All @@ -368,11 +372,11 @@ namespace Skylicht
dirPlaneY *= mulAxisY;

// for axis
float axisLengthInClipSpace = getSegmentLengthClipSpace(core::vector3df(0.f, 0.f, 0.f), dirAxis * m_screenFactor, camera);
float axisLengthInClipSpace = getSegmentLengthClipSpace(origin, origin + dirAxis * m_screenFactor, camera);
float paraSurf = getParallelogram(origin, origin + dirPlaneX * m_screenFactor, origin + dirPlaneY * m_screenFactor, camera);

float paraSurf = getParallelogram(core::vector3df(0.f, 0.f, 0.f), dirPlaneX * m_screenFactor, dirPlaneY * m_screenFactor, camera);
belowPlaneLimit = (paraSurf > 0.02f);
belowAxisLimit = (axisLengthInClipSpace > 0.08f);
belowPlaneLimit = (paraSurf > 0.0025f);
belowAxisLimit = (axisLengthInClipSpace > 0.02f);

// and store values
m_axisFactor[axisIndex] = mulAxis;
Expand Down Expand Up @@ -448,59 +452,152 @@ namespace Skylicht
int vpWidth = m_viewport.getWidth();
int vpHeight = m_viewport.getHeight();

for (int i = 0; i < 3; i++)
CHandles* handle = CHandles::getInstance();

if (m_mouseDown == false)
{
if (m_belowAxisLimit[i])
for (int i = 0; i < 3; i++)
{
core::vector3df start, end;
m_hoverOnAxis[i] = false;
m_hoverOnPlane[i] = false;
}

if (CProjective::getScreenCoordinatesFrom3DPosition(m_camera, m_translateAxis[i].start, start.X, start.Y, vpWidth, vpHeight))
// check hittest axis or plane on mouse move
for (int i = 0; i < 3; i++)
{
if (m_belowPlaneLimit[i] && m_screenFactor > 0.0f)
{
if (CProjective::getScreenCoordinatesFrom3DPosition(m_camera, m_translateAxis[i].end, end.X, end.Y, vpWidth, vpHeight))
core::line3df viewRay = CProjective::getViewRay(m_camera, mouse.X, mouse.Y, vpWidth, vpHeight);
core::vector3df n = m_translateAxis[i].getVector();
n.normalize();
core::plane3df plane(m_translateAxis[i].start, n);
core::vector3df out;
float quadMin = 0.1f;
float quadMax = 0.4f;

if (plane.getIntersectionWithLine(viewRay.start, viewRay.getVector(), out))
{
core::vector3df projective = pointOnSegment(mouse, start, end);
float length = projective.getDistanceFrom(mouse);
float length1 = mouse.getDistanceFrom(start);
core::vector3df v = out - m_translateAxis[i].start;

if (length < 10.0f && length1 > 10.0f)
// Project vector V to dirX and dirY
const float dx = m_translsatePlane[i].DirX.dotProduct(v / m_screenFactor);
const float dy = m_translsatePlane[i].DirY.dotProduct(v / m_screenFactor);

if (dx >= quadMin && dx <= quadMax && dy >= quadMin && dy < quadMax)
{
m_hoverOnAxis[i] = true;
m_hoverOnPlane[i] = true;
break;
}
else
{
m_hoverOnAxis[i] = false;
m_hoverOnPlane[i] = false;
}
}
}
}

if (m_belowPlaneLimit[i] && !m_hoverOnAxis[i] && m_screenFactor > 0.0f)
if (m_belowAxisLimit[i] && !m_hoverOnPlane[i])
{
core::vector3df start, end;
if (CProjective::getScreenCoordinatesFrom3DPosition(m_camera, m_translateAxis[i].start, start.X, start.Y, vpWidth, vpHeight))
{
if (CProjective::getScreenCoordinatesFrom3DPosition(m_camera, m_translateAxis[i].end, end.X, end.Y, vpWidth, vpHeight))
{
core::vector3df projective = pointOnSegment(mouse, start, end);
float length = projective.getDistanceFrom(mouse);
float length1 = mouse.getDistanceFrom(start);

if (length < 10.0f && length1 > 10.0f)
{
m_hoverOnAxis[i] = true;
break;
}
else
{
m_hoverOnAxis[i] = false;
}
}
}
}
}
}
else
{
// mouse dragging
for (int i = 0; i < 3; i++)
{
core::line3df viewRay = CProjective::getViewRay(m_camera, mouse.X, mouse.Y, vpWidth, vpHeight);
core::plane3df plane(m_translateAxis[i].start, m_translateAxis[i].getVector());
core::vector3df out;
float quadMin = 0.1f;
float quadMax = 0.4f;

if (plane.getIntersectionWithLine(viewRay.start, viewRay.getVector(), out))
if (m_hoverOnAxis[i])
{
core::vector3df v = out - m_translateAxis[i].start;
core::vector3df vec = m_translsatePlane[i].DirX;
vec.normalize();

core::line3df viewRay0 = CProjective::getViewRay(m_camera, m_lastMouse.X, m_lastMouse.Y, vpWidth, vpHeight);
core::line3df viewRay1 = CProjective::getViewRay(m_camera, mouse.X, mouse.Y, vpWidth, vpHeight);

// Project vector V to dirX and dirY
const float dx = m_translsatePlane[i].DirX.dotProduct(v / m_screenFactor);
const float dy = m_translsatePlane[i].DirY.dotProduct(v / m_screenFactor);
core::plane3df plane(m_translateAxis[i].start, vec);
core::vector3df out0, out1;

if (dx >= quadMin && dx <= quadMax && dy >= quadMin && dy < quadMax)
if (plane.getIntersectionWithLine(viewRay0.start, viewRay0.getVector(), out0))
{
m_hoverOnPlane[i] = true;
if (plane.getIntersectionWithLine(viewRay1.start, viewRay1.getVector(), out1))
{
core::vector3df axis = m_translateAxis[i].getVector();
axis.normalize();

float h0 = axis.dotProduct(out0);
float h1 = axis.dotProduct(out1);

core::vector3df offset = axis * (h1 - h0);
core::vector3df result = m_lastTranslatePosition + offset;
handle->setTranslateOffset(result - handle->getHandlePosition());

break;
}
}
else
}

if (m_hoverOnPlane[i])
{
core::vector3df vec = m_translateAxis[i].getVector();
vec.normalize();

core::line3df viewRay0 = CProjective::getViewRay(m_camera, m_lastMouse.X, m_lastMouse.Y, vpWidth, vpHeight);
core::line3df viewRay1 = CProjective::getViewRay(m_camera, mouse.X, mouse.Y, vpWidth, vpHeight);

core::plane3df plane(m_translateAxis[i].start, vec);
core::vector3df out0, out1;

if (plane.getIntersectionWithLine(viewRay0.start, viewRay0.getVector(), out0))
{
m_hoverOnPlane[i] = false;
if (plane.getIntersectionWithLine(viewRay1.start, viewRay1.getVector(), out1))
{
core::vector3df offset = out1 - out0;
core::vector3df result = m_lastTranslatePosition + offset;
handle->setTranslateOffset(result - handle->getHandlePosition());

break;
}
}
}
}
}

if (m_mouseState != state)
{
if (state == 1)
{
// mouse down
m_mouseDown = true;
m_lastMouse = mouse;
m_lastTranslatePosition = handle->getHandlePosition();
}
else if (state == 2)
{
// mouse up
m_mouseDown = false;
}
}

m_mouseState = state;
}
}
}
12 changes: 9 additions & 3 deletions Projects/Editor/Source/EditorComponents/Handles/CHandlesRenderer.h
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ namespace Skylicht
CHandlesData* m_data;

bool m_enable;

core::vector3df m_directionUnary[3];
video::SColor m_directionColor[3];
video::SColor m_selectionColor;
Expand All @@ -67,6 +67,12 @@ namespace Skylicht
CCamera* m_camera;
core::recti m_viewport;

int m_mouseState;
bool m_mouseDown;

core::vector3df m_lastMouse;
core::vector3df m_lastTranslatePosition;

public:
CHandlesRenderer();

Expand Down Expand Up @@ -110,13 +116,13 @@ namespace Skylicht

void drawScaleGizmo(const core::vector3df& pos, const core::vector3df& cameraLook, const core::vector3df& cameraUp, CCamera* camera);

void drawTranslateGizmo(const core::vector3df& pos, const core::vector3df& cameraLook, CCamera* camera);
void drawTranslateGizmo(const core::vector3df& pos, const core::vector3df& cameraPos, CCamera* camera);

float getSegmentLengthClipSpace(const core::vector3df& start, const core::vector3df& end, CCamera* camera);

float getParallelogram(const core::vector3df& ptO, const core::vector3df& ptA, const core::vector3df& ptB, CCamera* camera);

void computeTripodAxisAndVisibility(int axisIndex, core::vector3df& dirAxis, core::vector3df& dirPlaneX, core::vector3df& dirPlaneY, bool& belowAxisLimit, bool& belowPlaneLimit, CCamera* camera);
void computeTripodAxisAndVisibility(int axisIndex, const core::vector3df& origin, core::vector3df& dirAxis, core::vector3df& dirPlaneX, core::vector3df& dirPlaneY, bool& belowAxisLimit, bool& belowPlaneLimit, CCamera* camera);

core::vector3df pointOnSegment(const core::vector3df& point, const core::vector3df& vertPos1, const core::vector3df& vertPos2);

Expand Down
5 changes: 3 additions & 2 deletions Projects/Editor/Source/Handles/CHandles.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -55,9 +55,10 @@ namespace Skylicht

core::vector3df CHandles::positionHandle(const core::vector3df& position)
{
m_position = position;
m_handlePosition = true;
return position;
m_position = position + m_translateOffset;
m_translateOffset.set(0.0f, 0.0f, 0.0f);
return m_position;
}

core::vector3df CHandles::scaleHandle(const core::vector3df& scale, const core::vector3df& origin)
Expand Down
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