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[GUI] Radial gradient implementation

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This commit implements radial gradient as background and adds the option
to settings. It also renames "Color gradient" as "Linear gradient",
keeping Linear gradient default. Internally, it remains unchanged for
compatibility.

Radio gradient is more suitable for CAD, since it gives a more balanced
color distribution across the screen, improving visibility of model and
sketches with a halo-like effect.
This commit is contained in:
xtemp09
2023-04-01 13:34:55 +07:00
parent 181c7ba5eb
commit 414c803ff3
11 changed files with 129 additions and 29 deletions
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50
src/Gui/SoFCBackgroundGradient.cpp
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@@ -23,6 +23,11 @@
#include "PreCompiled.h"
#ifndef _PreComp_
#include <array>
#ifdef FC_OS_WIN32
#define _USE_MATH_DEFINES
#endif
#include <cmath>
#ifdef FC_OS_MACOSX
#include <OpenGL/gl.h>
#else
@@ -32,6 +37,16 @@
#include "SoFCBackgroundGradient.h"
static const std::array <GLfloat[2], 32> big_circle = []{
std::array <GLfloat[2], 32> result; int c = 0;
for (GLfloat i = 0; i < 2*M_PI; i += 2*M_PI / 32, c++){
result[c][0] = M_SQRT2*cosf(i); result[c][1] = M_SQRT2*sinf(i); }
return result; }();
static const std::array <GLfloat[2], 32> small_oval = []{
std::array <GLfloat[2], 32> result; int c = 0;
for (GLfloat i = 0; i < 2*M_PI; i += 2*M_PI / 32, c++){
result[c][0] = 0.3*M_SQRT2*cosf(i); result[c][1] = M_SQRT1_2*sinf(i); }
return result; }();
using namespace Gui;
@@ -51,6 +66,7 @@ SoFCBackgroundGradient::SoFCBackgroundGradient()
fCol.setValue(0.5f, 0.5f, 0.8f);
tCol.setValue(0.7f, 0.7f, 0.9f);
mCol.setValue(1.0f, 1.0f, 1.0f);
radial = false;
}
/*!
@@ -80,6 +96,7 @@ void SoFCBackgroundGradient::GLRender (SoGLRenderAction * /*action*/)
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_2D);
if(!radial){ // linear gradient
glBegin(GL_TRIANGLE_STRIP);
if (mCol[0] < 0) {
glColor3f(fCol[0],fCol[1],fCol[2]); glVertex2f(-1, 1);
@@ -99,6 +116,31 @@ void SoFCBackgroundGradient::GLRender (SoGLRenderAction * /*action*/)
glColor3f(mCol[0],mCol[1],mCol[2]); glVertex2f( 1, 0);
glColor3f(tCol[0],tCol[1],tCol[2]); glVertex2f( 1,-1);
}
} else { // radial gradient
glBegin(GL_TRIANGLE_FAN);
glColor3f(fCol[0], fCol[1], fCol[2]); glVertex2f(0.0f, 0.0f);
if (mCol[0] < 0) { // simple radial gradient
glColor3f(tCol[0], tCol[1], tCol[2]);
for (const GLfloat *vertex : big_circle)
glVertex2fv( vertex );
glVertex2fv( big_circle.front() );
} else {
glColor3f(mCol[0], mCol[1], mCol[2]);
for (const GLfloat *vertex : small_oval)
glVertex2fv( vertex );
glVertex2fv( small_oval.front() );
glEnd();
glBegin(GL_TRIANGLE_STRIP);
for (std::size_t i = 0; i < small_oval.size(); i++){
glColor3f(mCol[0], mCol[1], mCol[2]); glVertex2fv( small_oval[i] );
glColor3f(tCol[0], tCol[1], tCol[2]); glVertex2fv( big_circle[i] ); }
glColor3f(mCol[0], mCol[1], mCol[2]); glVertex2fv( small_oval.front() );
glColor3f(tCol[0], tCol[1], tCol[2]); glVertex2fv( big_circle.front() );
}
} // end of radial gradient
glEnd();
glPopAttrib();
@@ -109,18 +151,22 @@ void SoFCBackgroundGradient::GLRender (SoGLRenderAction * /*action*/)
}
void SoFCBackgroundGradient::setColorGradient(const SbColor& fromColor,
const SbColor& toColor)
const SbColor& toColor,
bool isRadial)
{
fCol = fromColor;
tCol = toColor;
mCol[0] = -1.0f;
radial = isRadial;
}
void SoFCBackgroundGradient::setColorGradient(const SbColor& fromColor,
const SbColor& toColor,
const SbColor& midColor)
const SbColor& midColor,
bool isRadial)
{
fCol = fromColor;
tCol = toColor;
mCol = midColor;
radial = isRadial;
}