Rotate gizmo interaction with mouse

This commit is contained in:
Enrico Turri 2018-06-15 16:16:55 +02:00
parent 6874949556
commit 53f8706805
3 changed files with 105 additions and 49 deletions

View file

@ -238,6 +238,11 @@ inline coordf_t dot(const Pointf &v1, const Pointf &v2) { return v1.x * v2.x + v
inline coordf_t dot(const Pointf &v) { return v.x * v.x + v.y * v.y; }
inline double length(const Vectorf &v) { return sqrt(dot(v)); }
inline double l2(const Vectorf &v) { return dot(v); }
inline Vectorf normalize(const Vectorf& v)
{
coordf_t len = ::sqrt(sqr(v.x) + sqr(v.y));
return (len != 0.0) ? 1.0 / len * v : Vectorf(0.0, 0.0);
}
class Pointf3 : public Pointf
{

View file

@ -17,6 +17,7 @@ const float GLGizmoBase::HighlightColor[3] = { 1.0f, 0.38f, 0.0f };
GLGizmoBase::Grabber::Grabber()
: center(Pointf(0.0, 0.0))
, angle_z(0.0f)
{
color[0] = 1.0f;
color[1] = 1.0f;
@ -25,13 +26,18 @@ GLGizmoBase::Grabber::Grabber()
void GLGizmoBase::Grabber::render(bool hover) const
{
float min_x = (float)center.x - HalfSize;
float max_x = (float)center.x + HalfSize;
float min_y = (float)center.y - HalfSize;
float max_y = (float)center.y + HalfSize;
float min_x = -HalfSize;
float max_x = +HalfSize;
float min_y = -HalfSize;
float max_y = +HalfSize;
::glColor3f((GLfloat)color[0], (GLfloat)color[1], (GLfloat)color[2]);
float angle_z_in_deg = angle_z * 180.0f / (float)PI;
::glPushMatrix();
::glTranslatef((GLfloat)center.x, (GLfloat)center.y, 0.0f);
::glRotatef((GLfloat)angle_z_in_deg, 0.0f, 0.0f, 1.0f);
::glDisable(GL_CULL_FACE);
::glBegin(GL_TRIANGLES);
::glVertex3f((GLfloat)min_x, (GLfloat)min_y, 0.0f);
@ -57,6 +63,8 @@ void GLGizmoBase::Grabber::render(bool hover) const
::glVertex3f((GLfloat)min_x, (GLfloat)max_y, 0.0f);
::glEnd();
}
::glPopMatrix();
}
GLGizmoBase::GLGizmoBase()
@ -137,6 +145,7 @@ void GLGizmoBase::render_grabbers() const
const float GLGizmoRotate::Offset = 5.0f;
const unsigned int GLGizmoRotate::CircleResolution = 64;
const unsigned int GLGizmoRotate::AngleResolution = 64;
const unsigned int GLGizmoRotate::ScaleStepsCount = 60;
const float GLGizmoRotate::ScaleStepRad = 2.0f * (float)PI / GLGizmoRotate::ScaleStepsCount;
const unsigned int GLGizmoRotate::ScaleLongEvery = 5;
@ -147,9 +156,11 @@ const float GLGizmoRotate::GrabberOffset = 5.0f;
GLGizmoRotate::GLGizmoRotate()
: GLGizmoBase()
, m_angle_x(0.0f)
, m_angle_y(0.0f)
// , m_angle_x(0.0f)
// , m_angle_y(0.0f)
, m_angle_z(0.0f)
, m_center(Pointf(0.0, 0.0))
, m_radius(0.0f)
{
}
@ -176,7 +187,22 @@ bool GLGizmoRotate::on_init()
void GLGizmoRotate::on_update(const Pointf& mouse_pos)
{
// std::cout << "GLGizmoRotate::on_update() - delta (" << delta.x << ", " << delta.y << ")" << std::endl;
Vectorf orig_dir(1.0, 0.0);
Vectorf new_dir = normalize(mouse_pos - m_center);
coordf_t theta = ::acos(clamp(-1.0, 1.0, dot(new_dir, orig_dir)));
if (cross(orig_dir, new_dir) < 0.0)
theta = 2.0 * (coordf_t)PI - theta;
if (length(m_center.vector_to(mouse_pos)) < 2.0 * (double)m_radius / 3.0)
{
coordf_t step = 2.0 * (coordf_t)PI / (coordf_t)SnapRegionsCount;
theta = step * (coordf_t)std::round(theta / step);
}
if (theta == 2.0 * (coordf_t)PI)
theta = 0.0;
m_angle_z = (float)theta;
}
void GLGizmoRotate::on_render(const BoundingBoxf3& box) const
@ -185,18 +211,20 @@ void GLGizmoRotate::on_render(const BoundingBoxf3& box) const
::glDisable(GL_DEPTH_TEST);
const Pointf3& size = box.size();
const Pointf3& center = box.center();
float radius = Offset + ::sqrt(sqr(0.5f * size.x) + sqr(0.5f * size.y));
m_center = box.center();
m_radius = Offset + ::sqrt(sqr(0.5f * size.x) + sqr(0.5f * size.y));
::glLineWidth(2.0f);
::glColor3fv(BaseColor);
_render_circle(center, radius);
_render_scale(center, radius);
_render_snap_radii(center, radius);
_render_reference_radius(center, radius);
_render_grabber(center, radius);
_render_circle();
_render_scale();
_render_snap_radii();
_render_reference_radius();
::glColor3fv(HighlightColor);
_render_angle_z();
_render_grabber();
}
void GLGizmoRotate::on_render_for_picking(const BoundingBoxf3& box) const
@ -210,23 +238,23 @@ void GLGizmoRotate::on_render_for_picking(const BoundingBoxf3& box) const
render_grabbers();
}
void GLGizmoRotate::_render_circle(const Pointf3& center, float radius) const
void GLGizmoRotate::_render_circle() const
{
::glBegin(GL_LINE_LOOP);
for (unsigned int i = 0; i < ScaleStepsCount; ++i)
{
float angle = (float)i * ScaleStepRad;
float x = center.x + ::cos(angle) * radius;
float y = center.y + ::sin(angle) * radius;
float x = m_center.x + ::cos(angle) * m_radius;
float y = m_center.y + ::sin(angle) * m_radius;
::glVertex3f((GLfloat)x, (GLfloat)y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_scale(const Pointf3& center, float radius) const
void GLGizmoRotate::_render_scale() const
{
float out_radius_long = radius + ScaleLongTooth;
float out_radius_short = radius + ScaleShortTooth;
float out_radius_long = m_radius + ScaleLongTooth;
float out_radius_short = m_radius + ScaleShortTooth;
::glBegin(GL_LINES);
for (unsigned int i = 0; i < ScaleStepsCount; ++i)
@ -234,55 +262,73 @@ void GLGizmoRotate::_render_scale(const Pointf3& center, float radius) const
float angle = (float)i * ScaleStepRad;
float cosa = ::cos(angle);
float sina = ::sin(angle);
float in_x = center.x + cosa * radius;
float in_y = center.y + sina * radius;
float out_x = (i % ScaleLongEvery == 0) ? center.x + cosa * out_radius_long : center.x + cosa * out_radius_short;
float out_y = (i % ScaleLongEvery == 0) ? center.y + sina * out_radius_long : center.y + sina * out_radius_short;
float in_x = m_center.x + cosa * m_radius;
float in_y = m_center.y + sina * m_radius;
float out_x = (i % ScaleLongEvery == 0) ? m_center.x + cosa * out_radius_long : m_center.x + cosa * out_radius_short;
float out_y = (i % ScaleLongEvery == 0) ? m_center.y + sina * out_radius_long : m_center.y + sina * out_radius_short;
::glVertex3f((GLfloat)in_x, (GLfloat)in_y, 0.0f);
::glVertex3f((GLfloat)out_x, (GLfloat)out_y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_snap_radii(const Pointf3& center, float radius) const
void GLGizmoRotate::_render_snap_radii() const
{
float step_deg = 2.0f * (float)PI / (float)SnapRegionsCount;
float step = 2.0f * (float)PI / (float)SnapRegionsCount;
float in_radius = radius / 3.0f;
float in_radius = m_radius / 3.0f;
float out_radius = 2.0f * in_radius;
::glBegin(GL_LINES);
for (unsigned int i = 0; i < SnapRegionsCount; ++i)
{
float angle = (float)i * step_deg;
float angle = (float)i * step;
float cosa = ::cos(angle);
float sina = ::sin(angle);
float in_x = center.x + cosa * in_radius;
float in_y = center.y + sina * in_radius;
float out_x = center.x + cosa * out_radius;
float out_y = center.y + sina * out_radius;
float in_x = m_center.x + cosa * in_radius;
float in_y = m_center.y + sina * in_radius;
float out_x = m_center.x + cosa * out_radius;
float out_y = m_center.y + sina * out_radius;
::glVertex3f((GLfloat)in_x, (GLfloat)in_y, 0.0f);
::glVertex3f((GLfloat)out_x, (GLfloat)out_y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_reference_radius(const Pointf3& center, float radius) const
void GLGizmoRotate::_render_reference_radius() const
{
::glBegin(GL_LINES);
::glVertex3f((GLfloat)center.x, (GLfloat)center.y, 0.0f);
::glVertex3f((GLfloat)center.x + radius, (GLfloat)center.y, 0.0f);
::glVertex3f((GLfloat)m_center.x, (GLfloat)m_center.y, 0.0f);
::glVertex3f((GLfloat)m_center.x + m_radius + GrabberOffset, (GLfloat)m_center.y, 0.0f);
::glEnd();
}
void GLGizmoRotate::_render_grabber(const Pointf3& center, float radius) const
void GLGizmoRotate::_render_angle_z() const
{
float grabber_radius = radius + GrabberOffset;
m_grabbers[0].center.x = center.x + ::cos(m_angle_z) * grabber_radius;
m_grabbers[0].center.y = center.y + ::sin(m_angle_z) * grabber_radius;
float step_angle = m_angle_z / AngleResolution;
float ex_radius = m_radius + GrabberOffset;
::glBegin(GL_LINE_STRIP);
for (unsigned int i = 0; i <= AngleResolution; ++i)
{
float angle = (float)i * step_angle;
float x = m_center.x + ::cos(angle) * ex_radius;
float y = m_center.y + ::sin(angle) * ex_radius;
::glVertex3f((GLfloat)x, (GLfloat)y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_grabber() const
{
float grabber_radius = m_radius + GrabberOffset;
m_grabbers[0].center.x = m_center.x + ::cos(m_angle_z) * grabber_radius;
m_grabbers[0].center.y = m_center.y + ::sin(m_angle_z) * grabber_radius;
m_grabbers[0].angle_z = m_angle_z;
::glColor3fv(BaseColor);
::glBegin(GL_LINES);
::glVertex3f((GLfloat)center.x, (GLfloat)center.y, 0.0f);
::glVertex3f((GLfloat)m_center.x, (GLfloat)m_center.y, 0.0f);
::glVertex3f((GLfloat)m_grabbers[0].center.x, (GLfloat)m_grabbers[0].center.y, 0.0f);
::glEnd();
@ -330,7 +376,6 @@ void GLGizmoScale::on_update(const Pointf& mouse_pos)
coordf_t orig_len = length(m_start_drag_position - center);
coordf_t new_len = length(mouse_pos - center);
coordf_t ratio = (orig_len != 0.0) ? new_len / orig_len : 1.0;
m_scale_x = (float)ratio;

View file

@ -25,6 +25,7 @@ protected:
static const float HoverOffset;
Pointf center;
float angle_z;
float color[3];
Grabber();
@ -82,6 +83,7 @@ class GLGizmoRotate : public GLGizmoBase
{
static const float Offset;
static const unsigned int CircleResolution;
static const unsigned int AngleResolution;
static const unsigned int ScaleStepsCount;
static const float ScaleStepRad;
static const unsigned int ScaleLongEvery;
@ -90,10 +92,13 @@ class GLGizmoRotate : public GLGizmoBase
static const unsigned int SnapRegionsCount;
static const float GrabberOffset;
float m_angle_x;
float m_angle_y;
// float m_angle_x;
// float m_angle_y;
float m_angle_z;
mutable Pointf m_center;
mutable float m_radius;
public:
GLGizmoRotate();
@ -104,11 +109,12 @@ protected:
virtual void on_render_for_picking(const BoundingBoxf3& box) const;
private:
void _render_circle(const Pointf3& center, float radius) const;
void _render_scale(const Pointf3& center, float radius) const;
void _render_snap_radii(const Pointf3& center, float radius) const;
void _render_reference_radius(const Pointf3& center, float radius) const;
void _render_grabber(const Pointf3& center, float radius) const;
void _render_circle() const;
void _render_scale() const;
void _render_snap_radii() const;
void _render_reference_radius() const;
void _render_angle_z() const;
void _render_grabber() const;
};
class GLGizmoScale : public GLGizmoBase