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Unified behavior in Geometry view: SHIFT for discrete transform (unit

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translation, rotation, scaling) and ALT key for alternative transform
(central scaling, axis translation)
This commit is contained in:
brunoherbelin
2020-09-03 00:07:57 +02:00
parent 3ca6bfa396
commit cc3f824bfa
3 changed files with 96 additions and 41 deletions
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134
View.cpp
View File

@@ -746,45 +746,57 @@ View::Cursor GeometryView::grab (Source *s, glm::vec2 from, glm::vec2 to, std::p
glm::vec4 source_to = glm::inverse(s->stored_status_->transform_) * glm::vec4( scene_to, 1.f );
glm::vec3 source_scaling = glm::vec3(source_to) / glm::vec3(source_from);
if (UserInterface::manager().shiftModifier()) {
source_scaling.x = float( int( source_scaling.x * 10.f ) ) / 10.f;
source_scaling.y = float( int( source_scaling.y * 10.f ) ) / 10.f;
}
// which manipulation to perform?
std::ostringstream info;
if (pick.first) {
// which corner was picked ?
glm::vec2 corner = glm::sign(pick.second);
// transform from source center to corner
glm::mat4 T = GlmToolkit::transform(glm::vec3(corner.x, corner.y, 0.f), glm::vec3(0.f, 0.f, 0.f),
glm::vec3(1.f / s->frame()->aspectRatio(), 1.f, 1.f));
// transformation from scene to corner:
glm::mat4 scene_to_corner_transform = T * glm::inverse(s->stored_status_->transform_);
glm::mat4 corner_to_scene_transform = glm::inverse(scene_to_corner_transform);
// compute cursor movement in corner reference frame
glm::vec4 corner_from = scene_to_corner_transform * glm::vec4( scene_from, 1.f );
glm::vec4 corner_to = scene_to_corner_transform * glm::vec4( scene_to, 1.f );
// operation of scaling in corner reference frame
glm::vec3 corner_scaling = glm::vec3(corner_to) / glm::vec3(corner_from);
if (UserInterface::manager().shiftModifier()) {
corner_scaling.x = float( int( corner_scaling.x * 10.f ) ) / 10.f;
corner_scaling.y = float( int( corner_scaling.y * 10.f ) ) / 10.f;
}
// convert source position in corner reference frame
glm::vec4 center = scene_to_corner_transform * glm::vec4( s->stored_status_->translation_, 1.f);
// picking on the resizing handles in the corners
if ( pick.first == s->handle_[Handles::RESIZE] ) {
// which corner was picked ?
glm::vec2 corner = glm::sign(pick.second);
// transform from source center to corner
glm::mat4 T = GlmToolkit::transform(glm::vec3(corner.x, corner.y, 0.f),
glm::vec3(0.f, 0.f, 0.f),
glm::vec3(1.f / s->frame()->aspectRatio(), 1.f, 1.f));
// transformation from scene to corner:
glm::mat4 scene_to_corner_transform = T * glm::inverse(s->stored_status_->transform_);
glm::mat4 corner_to_scene_transform = glm::inverse(scene_to_corner_transform);
// A) OPERATION: SCALING IN CORNER REF
// compute cursor movement in corner reference frame
glm::vec4 corner_from = scene_to_corner_transform * glm::vec4( scene_from, 1.f );
glm::vec4 corner_to = scene_to_corner_transform * glm::vec4( scene_to, 1.f );
// operation of scaling in corner reference frame
glm::vec3 sca = glm::vec3(corner_to) / glm::vec3(corner_from);
glm::mat4 corner_scale_op = glm::scale(glm::identity<glm::mat4>(), sca);
// B) MOVES THE SOURCE CENTER
// convert source position in corner reference frame
glm::vec4 center = scene_to_corner_transform * glm::vec4( s->stored_status_->translation_, 1.f);
// transform source center (in corner reference frame)
center = corner_scale_op * center;
// convert center back into scene reference frame
center = corner_to_scene_transform * center;
// apply to source node
sourceNode->translation_ = glm::vec3(center);
// C) SCALE THE SOURCE
sourceNode->scale_ = sca * s->stored_status_->scale_;
// ALT resize : centered
if (UserInterface::manager().altModifier()) {
sourceNode->scale_ = s->stored_status_->scale_ * source_scaling;
}
// normal resize: corner scale
else {
// transform source center (in corner reference frame)
center = glm::scale(glm::identity<glm::mat4>(), corner_scaling) * center;
// convert center back into scene reference frame
center = corner_to_scene_transform * center;
// apply to node
sourceNode->translation_ = glm::vec3(center);
// scale nde
sourceNode->scale_ = s->stored_status_->scale_ * corner_scaling;
}
// show cursor depending on diagonal (corner picked)
ret.type = corner.x * corner.y > 0.f ? Cursor_ResizeNESW : Cursor_ResizeNWSE;
@@ -793,9 +805,24 @@ View::Cursor GeometryView::grab (Source *s, glm::vec2 from, glm::vec2 to, std::p
}
// picking on the resizing handles left or right
else if ( pick.first == s->handle_[Handles::RESIZE_H] ) {
sourceNode->scale_ = s->stored_status_->scale_ * glm::vec3(source_scaling.x, 1.f, 1.f);
if (UserInterface::manager().altModifier())
sourceNode->scale_.x = float( int( sourceNode->scale_.x * 10.f ) ) / 10.f;
// ALT resize : centered
if (UserInterface::manager().altModifier()) {
sourceNode->scale_ = s->stored_status_->scale_ * glm::vec3(source_scaling.x, 1.f, 1.f);
}
// normal resize: side scale
else {
// HORIZONTAL only
corner_scaling = glm::vec3(corner_scaling.x, 1.f, 1.f);
// transform source center (in corner reference frame)
center = glm::scale(glm::identity<glm::mat4>(), corner_scaling) * center;
// convert center back into scene reference frame
center = corner_to_scene_transform * center;
// apply to node
sourceNode->translation_ = glm::vec3(center);
// scale
sourceNode->scale_ = s->stored_status_->scale_ * corner_scaling;
}
ret.type = Cursor_ResizeEW;
info << "Size " << std::fixed << std::setprecision(3) << sourceNode->scale_.x;
@@ -803,9 +830,24 @@ View::Cursor GeometryView::grab (Source *s, glm::vec2 from, glm::vec2 to, std::p
}
// picking on the resizing handles top or bottom
else if ( pick.first == s->handle_[Handles::RESIZE_V] ) {
sourceNode->scale_ = s->stored_status_->scale_ * glm::vec3(1.f, source_scaling.y, 1.f);
if (UserInterface::manager().altModifier())
sourceNode->scale_.y = float( int( sourceNode->scale_.y * 10.f ) ) / 10.f;
// ALT resize : centered
if (UserInterface::manager().altModifier()) {
sourceNode->scale_ = s->stored_status_->scale_ * glm::vec3(1.f, source_scaling.y, 1.f);
}
// normal resize: side scale
else {
// VERTICAL ONLY
corner_scaling = glm::vec3(1.f, corner_scaling.y, 1.f);
// transform source center (in corner reference frame)
center = glm::scale(glm::identity<glm::mat4>(), corner_scaling) * center;
// convert center back into scene reference frame
center = corner_to_scene_transform * center;
// apply to node
sourceNode->translation_ = glm::vec3(center);
// scale
sourceNode->scale_ = s->stored_status_->scale_ * corner_scaling;
}
ret.type = Cursor_ResizeNS;
info << "Size " << std::fixed << std::setprecision(3) << sourceNode->scale_.x;
@@ -823,7 +865,7 @@ View::Cursor GeometryView::grab (Source *s, glm::vec2 from, glm::vec2 to, std::p
sourceNode->rotation_ = s->stored_status_->rotation_ + glm::vec3(0.f, 0.f, angle);
int degrees = int( glm::degrees(sourceNode->rotation_.z) );
if (UserInterface::manager().altModifier()) {
if (UserInterface::manager().shiftModifier()) {
degrees = (degrees / 10) * 10;
sourceNode->rotation_.z = glm::radians( float(degrees) );
}
@@ -835,11 +877,20 @@ View::Cursor GeometryView::grab (Source *s, glm::vec2 from, glm::vec2 to, std::p
else {
sourceNode->translation_ = s->stored_status_->translation_ + scene_translation;
if (UserInterface::manager().altModifier()) {
if (UserInterface::manager().shiftModifier()) {
sourceNode->translation_.x = float( int( sourceNode->translation_.x * 10.f ) ) / 10.f;
sourceNode->translation_.y = float( int( sourceNode->translation_.y * 10.f ) ) / 10.f;
}
// ALT: single axis movement
if (UserInterface::manager().altModifier()) {
glm::vec3 dif = s->stored_status_->translation_ - sourceNode->translation_;
if (ABS(dif.x) > ABS(dif.y) )
sourceNode->translation_.y = s->stored_status_->translation_.y;
else
sourceNode->translation_.x = s->stored_status_->translation_.x;
}
ret.type = Cursor_ResizeAll;
info << "Position (" << std::fixed << std::setprecision(3) << sourceNode->translation_.x;
info << ", " << sourceNode->translation_.y << ")";
@@ -853,6 +904,7 @@ View::Cursor GeometryView::grab (Source *s, glm::vec2 from, glm::vec2 to, std::p
// info << ", " << sourceNode->translation_.y << ")";
// }
// request update
s->touch();