void Rigid_body_viewer:: draw()
{
// parent's status text
Viewer_2D::draw();
// draw walls
glDisable(GL_LIGHTING);
glLineWidth(1.0);
glColor3f(0.5,0.5,0.5);
glBegin(GL_LINE_STRIP);
glVertex2f( -1.0, 1.0 );
glVertex2f( -1.0, -1.0 );
glVertex2f( 1.0, -1.0 );
glVertex2f( 1.0, 1.0 );
glVertex2f( -1.0, 1.0 );
glEnd();
// draw rigid body
body_.draw();
// draw mouse spring
if (mouse_spring_.active)
{
glLineWidth(5.0);
glColor3f(1,0,0);
glBegin(GL_LINES);
glVertex2fv( body_.points[ mouse_spring_.particle_index ].data() );
glVertex2fv( mouse_spring_.mouse_position.data() );
glEnd();
}
}
void GlassLayer::draw(Graphics* const TheGraphics, const Pnt2f& TopLeft, const Pnt2f& BottomRight, const Real32 Opacity) const
{
Pnt2f IntermediatePosition;
Vec3f Bounds(BottomRight- TopLeft);
//Setup the Blending equations properly
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glBegin(GL_TRIANGLE_FAN);
glColor4f(getEdgeColor().red(),getEdgeColor().green(),getEdgeColor().blue(),getEdgeColor().alpha() * Opacity);
glVertex2f(getStartPosition().x(), getEndPosition().y());
glColor4f(getCenterColor().red(),getCenterColor().green(),getCenterColor().blue(),getCenterColor().alpha() * Opacity);
glVertex2fv(getStartPosition().getValues());
for(UInt32 i(0) ; i<_Segments.size(); ++i)
{
IntermediatePosition.setValues(_Segments[i].x() * Bounds.x(),_Segments[i].y() * Bounds.y());
glVertex2fv(IntermediatePosition.getValues());
}
glVertex2fv(getEndPosition().getValues());
glEnd();
glDisable(GL_BLEND);
}
void drawSpline(const Gm::Spline2& spline, Gs::Real a, Gs::Real b, std::size_t segments)
{
// draw curve
glBegin(GL_LINE_STRIP);
auto step = (b - a) / segments;
for (std::size_t i = 0; i <= segments; ++i)
{
glColor4f(1, 1, 1, 1);
// interpolate vertex
auto p = spline(a);
glVertex2fv(p.Ptr());
a += step;
}
glEnd();
// draw control points
glPointSize(5.0f);
glBegin(GL_POINTS);
for (const auto& p : spline.GetPoints())
{
glColor4f(1, 0, 0, 1);
glVertex2fv(p.point.Ptr());
}
glEnd();
glPointSize(1.0f);
}
static void Lines(void)
{
GLint i,j;
float v1[3],v2[3];
double start;
start=Now();
for(i=0;i<repeatCount;i++)
{
v1[0]=10;
v1[1]=10;
v1[2]=10;
v2[0]=20;
v2[1]=20;
v2[2]=10;
glBegin(GL_LINES);
for(j=0;j<loopCount;j++)
{
glVertex2fv(v1);
glVertex2fv(v2);
}
glEnd();
}
glFinish();
}
void GLUI_Rotation::iaction_draw_active_area_ortho( void )
{
float radius;
radius = (float)(h-22)/2.0; /*MIN((float)w/2.0, (float)h/2.0); */
/********* Draw emboss circles around arcball control *********/
int k;
glLineWidth( 1.0 );
glBegin( GL_LINE_LOOP);
for( k=0; k<60; k++ ) {
float phi = 2*M_PI*(float)k/60.0;
vec2 p( cos(phi) * (2.0 + radius), sin(phi) * (2.0 + radius));
if ( p[1] < -p[0] ) glColor3ub( 128,128,128 );
else glColor3ub( 255,255,255 );
glVertex2fv((float*)&p[0]);
}
glEnd();
glBegin( GL_LINE_LOOP);
for( k=0; k<60; k++ ) {
float phi = 2*M_PI*(float)k/60.0;
vec2 p( cos(phi) * (1.0 + radius), sin(phi) * (1.0 + radius));
if ( enabled ) {
if ( p[1] < -p[0] ) glColor3ub( 0,0,0);
else glColor3ub( 192,192,192);
}
else
{
if ( p[1] < -p[0] ) glColor3ub( 180,180,180);
else glColor3ub( 192,192,192);
}
glVertex2fv((float*)&p[0]);
}
glEnd();
}
void clip_draw_cfra(SpaceClip *sc, ARegion *ar, Scene *scene)
{
View2D *v2d = &ar->v2d;
float xscale, yscale;
float vec[2];
/* Draw a light green line to indicate current frame */
vec[0] = (float)(sc->user.framenr * scene->r.framelen);
UI_ThemeColor(TH_CFRAME);
glLineWidth(2.0);
glBegin(GL_LINE_STRIP);
vec[1] = v2d->cur.ymin;
glVertex2fv(vec);
vec[1] = v2d->cur.ymax;
glVertex2fv(vec);
glEnd();
glLineWidth(1.0);
UI_view2d_view_orthoSpecial(ar, v2d, 1);
/* because the frame number text is subject to the same scaling as the contents of the view */
UI_view2d_scale_get(v2d, &xscale, &yscale);
glScalef(1.0f / xscale, 1.0f, 1.0f);
ED_region_cache_draw_curfra_label(sc->user.framenr, (float)sc->user.framenr * xscale, 18);
/* restore view transform */
glScalef(xscale, 1.0, 1.0);
}
void drawBezierCurve(const Gm::BezierCurve2& curve, std::size_t segments)
{
// draw curve
glBegin(GL_LINE_STRIP);
auto t = Gs::Real(0);
auto step = Gs::Real(1) / segments;
for (std::size_t i = 0; i <= segments; ++i)
{
glColor4f(1, 1, 1, 1);
// interpolate vertex
auto p = curve(t);
glVertex2fv(p.Ptr());
t += step;
}
glEnd();
// draw control points
glPointSize(5.0f);
glBegin(GL_POINTS);
for (const auto& p : curve.controlPoints)
{
glColor4f(1, 1, 0, 1);
glVertex2fv(p.Ptr());
}
glEnd();
glPointSize(1.0f);
}
///////////////////////////////////////////////////////////////////////////////
/// \brief Prints out a string using this font, beginning with the baseline
/// at the origin.
///
/// \param text The string to print.
/// \param color The base color to modulate by the font texture.
void TextureFont::print(const std::string& text, const color4& color) const
{
vec2 cursor; // where the current character should be drawn
F32 scale_x = 1.0f / texture_.getDimensions().x;
F32 scale_y = 1.0f / texture_.getDimensions().y;
for (char c : text)
{
const TextureFontCharacter& ch = (*this)[c];
// vertices
vec2 top_left(cursor + ch.character_offset);
vec2 bottom_right(top_left.x + ch.texture_dimensions.x, top_left.y - ch.texture_dimensions.y);
vec2 tex_top_left(ch.texture_offset);
vec2 tex_bottom_right(tex_top_left + ch.texture_dimensions);
tex_top_left.x *= scale_x; tex_bottom_right.x *= scale_x;
tex_top_left.y *= scale_y; tex_bottom_right.y *= scale_y;
cursor.x += ch.character_advance;
texture_.enable(GL_MODULATE);
glColor4fv(glm::value_ptr(color));
glBegin(GL_QUADS);
glTexCoord2fv(glm::value_ptr(tex_top_left)); glVertex2fv(glm::value_ptr(top_left));
glTexCoord2f(tex_top_left.x, tex_bottom_right.y); glVertex2f(top_left.x, bottom_right.y);
glTexCoord2fv(glm::value_ptr(tex_bottom_right)); glVertex2fv(glm::value_ptr(bottom_right));
glTexCoord2f(tex_bottom_right.x, tex_top_left.y); glVertex2f(bottom_right.x, top_left.y);
glEnd();
texture_.disable();
}
}
static void redrawCB(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
/* Perform scene rotations based on user mouse input. */
if (!mapMode) {
glRotatef(angle2, 1.0f, 0.0f, 0.0f);
glRotatef(angle, 0.0f, 1.0f, 0.0f);
}
glLightfv(GL_LIGHT0, GL_POSITION, sunDirection);
if (mapMode) {
/* use the normals for a sphere on a flat surface to get
* the lighting as if we unwrapped a lighted sphere. */
int lat, lon;
for (lat = 0; lat < LAT_GRID; lat++) {
glBegin(GL_TRIANGLE_STRIP);
for (lon = 0; lon <= LON_GRID; lon++) {
glTexCoord2fv(uv[lat + 1][lon]);
glNormal3fv(sphere[lat + 1][lon]);
glVertex2fv(map[lat + 1][lon]);
glTexCoord2fv(uv[lat][lon]);
glNormal3fv(sphere[lat][lon]);
glVertex2fv(map[lat][lon]);
}
glEnd();
}
}
else {
/* draw a sphere */
int lat, lon;
for (lat = 0; lat < LAT_GRID; lat++) {
glBegin(GL_TRIANGLE_STRIP);
for (lon = 0; lon <= LON_GRID; lon++) {
glTexCoord2fv(uv[lat + 1][lon]);
glNormal3fv(sphere[lat + 1][lon]);
glVertex3fv(sphere[lat + 1][lon]);
glTexCoord2fv(uv[lat][lon]);
glNormal3fv(sphere[lat][lon]);
glVertex3fv(sphere[lat][lon]);
}
glEnd();
}
}
glPopMatrix();
glutSwapBuffers();
}
void t(point2d a,point2d b,point2d c){
glBegin(GL_TRIANGLES);
glVertex2fv(a);
glVertex2fv(b);
glVertex2fv(c);
glEnd();
}
void Draw() { //Function to Draw the BEzier Curve
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(0.0, 1.0, 0.0);
glPointSize(5.0);
glBegin(GL_POINTS); //Drawing the Four control points
glVertex2fv(bez_pnt[0]);
glColor3f(0.0, 1.0, 0.0);
glVertex2fv(bez_pnt[1]);
glColor3f(0.0, 1.0, 0.0);
glVertex2fv(bez_pnt[2]);
glColor3f(0.0, 1.0, 0.0);
glVertex2fv(bez_pnt[3]);
glEnd();
while(bez_t <= 1) //Parametric curve from t=0 to t=1
{
i=3;
while(i>0)
{
for(j=0;j<i;j++)
{
bez_pnt[j][0]=decasteljau(bez_t,bez_pnt[j][0],bez_pnt[j+1][0]);
bez_pnt[j][1]=decasteljau(bez_t,bez_pnt[j][1],bez_pnt[j+1][1]);
}
i=i-1;
}
glColor3f(0.0, 0.0, 1.0);
glPointSize(1.0);
glBegin(GL_POINTS); //Draw the points on curve
glVertex2fv(bez_pnt[0]);
glEnd();
bez_t=bez_t+0.00001; //Increment t by 0.00001
}
glFlush();
}
void Display (void){
float V[][2] ={
-5.,-5.,
-5., 5.,
8., 5.,
8.,-5.
};
glTranslated(1.5,0,0);
glRotated(45, 0, 0, 1);
glTranslated(-1.5,0,0);
glClear (GL_COLOR_BUFFER_BIT);
glBegin (GL_POLYGON);
glVertex2fv (V[0]);
glVertex2fv (V[1]);
glVertex2fv (V[2]);
glVertex2fv (V[3]);
glEnd ();
glLoadIdentity();
glTranslated(6,7,0);
glBegin(GL_TRIANGLES);
glColor3f (1., 0., 0.);
glVertex2d(2.,2.);
glColor3f (0., 1., 0.);
glVertex2d(5.,2.);
glColor3f (0., 0., 1.);
glVertex2d(3.5,5);
glEnd();
glFlush ();
}
void star()
{
GLfloat v[13][2] = {
{0, 0},
{0, 0.5}, {0.1, 0.3},
{0.4, 0.3}, {0.25, 0},
{0.4, -0.3}, {0.1, -0.3},
{0, -0.5}, {-0.1, -0.3},
{-0.4, -0.3}, {-0.25, 0},
{-0.4, 0.3}, {-0.1, 0.3}
};
GLfloat color[7][3] = {
{1, 1, 1}, // white
{1, 0, 0}, // red
{1, 0, 1}, // pink
{0, 0, 1}, // blue
{0, 1, 1}, // light blue
{0, 1, 0}, // green
{1, 1, 0} // yellow
};
glBegin(GL_POLYGON);
glColor3fv(color[0]);
glVertex2fv(v[0]);
for (GLint i = 1; i <= 6; ++i) {
glColor3fv(color[i]);
glVertex2fv(v[2 * i - 1]);
glVertex2fv(v[2 * i]);
}
glColor3fv(color[1]);
glVertex2fv(v[1]);
glEnd();
glFlush();
}
/* desenha um triângulo */
void triangulo(GLfloat *v1, GLfloat *v2, GLfloat *v3)
{
/* desenha um triângulo */
glVertex2fv(v1);
glVertex2fv(v2);
glVertex2fv(v3);
}
void DebugDraw :: DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color) {
glColor3fv(&color.r);
glBegin(GL_LINES);
glVertex2fv(&p1.x);
glVertex2fv(&p2.x);
glEnd();
}
/* General call for drawing current frame indicator in animation editor */
void ANIM_draw_cfra(const bContext *C, View2D *v2d, short flag)
{
Scene *scene = CTX_data_scene(C);
float vec[2];
/* Draw a light green line to indicate current frame */
vec[0] = (float)(scene->r.cfra * scene->r.framelen);
UI_ThemeColor(TH_CFRAME);
if (flag & DRAWCFRA_WIDE)
glLineWidth(3.0);
else
glLineWidth(2.0);
glBegin(GL_LINE_STRIP);
vec[1] = v2d->cur.ymin - 500.0f; /* XXX arbitrary... want it go to bottom */
glVertex2fv(vec);
vec[1] = v2d->cur.ymax;
glVertex2fv(vec);
glEnd();
glLineWidth(1.0);
/* Draw current frame number in a little box */
if (flag & DRAWCFRA_SHOW_NUMBOX) {
UI_view2d_view_orthoSpecial(CTX_wm_region(C), v2d, 1);
draw_cfra_number(scene, v2d, vec[0], (flag & DRAWCFRA_UNIT_SECONDS) != 0);
}
}
void triangle( GLfloat *a, GLfloat *b, GLfloat *c)
/* specify one triangle */
{
glVertex2fv(a);
glVertex2fv(b);
glVertex2fv(c);
}
void draw_segmentset2d(const std::vector<Vec2f>& vertices, const std::vector<Vec2i>& edges) {
glBegin(GL_LINES);
for(unsigned int i = 0; i < edges.size(); ++i) {
glVertex2fv(vertices[edges[i][0]].v);
glVertex2fv(vertices[edges[i][1]].v);
}
glEnd();
}
void draw_box2d(const Vec2f& origin, float width, float height) {
glBegin(GL_POLYGON);
glVertex2fv(origin.v);
glVertex2fv((origin + Vec2f(0, height)).v);
glVertex2fv((origin + Vec2f(width, height)).v);
glVertex2fv((origin + Vec2f(width, 0)).v);
glEnd();
}
/*draw a triangle */
void drawTriangle(float *v1, float *v2, float *v3)
{
glBegin(GL_TRIANGLES);
glVertex2fv(v1);
glVertex2fv(v2);
glVertex2fv(v3);
glEnd();
}
void VoronoiPolygonSite::DrawSite()
{
glBegin(GL_LINE_STRIP);
for (int k=0; k<NumPts*2; k+=2)
glVertex2fv(&(Pts[k]));
glVertex2fv(Pts);
glEnd();
}
/**
* What this function does is on a mouse press, it sets a vector to hold a specific triangle point.
* Now, there is one problem in that the window's coordinate system is different from our drawing coordinate
* system. In order to draw correctly, we transform the (x,y) from window to (x',y') of our world coordinate
* system.
*
* The way I did this was to use gluUnProject which returns the transformed coordinates. The reason I pass the y
* value in as I do is because y starts at upper left and I need to ensure that y is subtracted from viewport[3]
* which holds the viewHeight(yMax + yMin). The z coordinate is passed as 0.0f as we are only drawing in 2D space.
*
* Reference: http://www.opengl.org/discussion_boards/showthread.php/126012-converting-window-coordinates-to-world-coordinates
*/
void MyPanelOpenGL::mousePressEvent(QMouseEvent *event)
{
if (event->button() != Qt::LeftButton)
return;
// Get the position of where the mouse clicked and set that as triangle point
lastPos = event->pos();
GLdouble x;
GLdouble y;
GLdouble z;
GLdouble projection[16]; //var to hold the projection matrix info
GLint viewport[4]; //var to hold the viewport info
GLdouble modelview[16]; //var to hold the modelview info
glGetDoublev( GL_PROJECTION_MATRIX, projection ); //get the projection matrix info
glGetIntegerv( GL_VIEWPORT, viewport ); //get the viewport info
glGetDoublev( GL_MODELVIEW_MATRIX, modelview ); //get the modelview info
gluUnProject( lastPos.x(), (float)viewport[3] - (float)lastPos.y(), 0.0f, modelview, projection, viewport, &x, &y, &z);
if (currPoint == 1)
{
triangle_point1[0] = x;
triangle_point1[1] = y;
glLoadIdentity();
glTranslated(5.0, 5.0, 0.0);
glColor3f(0.0f, 0.0f, 1.0f);
glBegin(GL_POINT);
glVertex2fv(triangle_point1);
glEnd();
//emit(trianglePoint1Changed());
} else if (currPoint == 2)
{
triangle_point2[0] = x;
triangle_point2[1] = y;
glColor3f(0.0f, 0.0f, 1.0f);
glBegin(GL_POINT);
glVertex2fv(triangle_point2);
glEnd();
//emit(trianglePoint1Changed());
} else if (currPoint == 3)
{
triangle_point3[0] = x;
triangle_point3[1] = y;
glColor3f(0.0f, 0.0f, 1.0f);
glBegin(GL_POINT);
glVertex2fv(triangle_point3);
glEnd();
//emit(trianglePoint1Changed());
}
updateGL();
}
void draw_trimesh2d(const std::vector<Vec2f>& vertices, const std::vector<Vec3ui>& tris) {
glBegin(GL_TRIANGLES);
for(unsigned int i = 0; i < tris.size(); ++i) {
glVertex2fv(vertices[tris[i][0]].v);
glVertex2fv(vertices[tris[i][1]].v);
glVertex2fv(vertices[tris[i][2]].v);
}
glEnd();
}
// methods
void Line::Render(void) const
{
glBegin(GL_LINES);
glVertex2fv( (d[0] * trans).v );
glVertex2fv( (d[1] * trans).v );
glEnd();
}
void draw_line(const mat4 &m, const line &a, const vec4 &color)
{
glLoadIdentity();
glLoadMatrixf(m.m);
glColor4fv(color.v);
glBegin(GL_LINES);
glVertex2fv(a.position.v);
glVertex2fv(a.end.v);
glEnd();
}
void cube_quad(const struct wc_cube_t *ptr,
int n0, int n1, int n2, int n3)
{
glBegin(GL_POLYGON);
glVertex2fv((GLfloat*)(ptr->buffer + n0));
glVertex2fv((GLfloat*)(ptr->buffer + n1));
glVertex2fv((GLfloat*)(ptr->buffer + n2));
glVertex2fv((GLfloat*)(ptr->buffer + n3));
glEnd();
}
void fdrawline(float x1, float y1, float x2, float y2)
{
float v[2];
glBegin(GL_LINE_STRIP);
v[0] = x1; v[1] = y1;
glVertex2fv(v);
v[0] = x2; v[1] = y2;
glVertex2fv(v);
glEnd();
}
void Shape::draw(){
glColor3f(1, 1, 1);
glBegin(GL_POLYGON);
for (int i=0, l=vertices.size(); i<l; i++)
glVertex2fv(vertices[i].data);
glEnd();
glColor3f(0, .3, 1);
glPointSize(5);
glBegin(GL_POINTS);
for (int i=0, l=vertices.size(); i<l; i++)
glVertex2fv(vertices[i].data);
glEnd();
}
void drawWigginsEast(void)
{
orderedPair wigginsEast1 = { 70.0, 282.0 };
orderedPair wigginsEast2 = { 80.0, 282.0 };
orderedPair wigginsEast3 = { 80.0, 238.0 };
orderedPair wigginsEast4 = { 70.0, 238.0 };
glBegin(GL_POLYGON);
glVertex2fv(wigginsEast1);
glVertex2fv(wigginsEast2);
glVertex2fv(wigginsEast3);
glVertex2fv(wigginsEast4);
glEnd();
}
void TFGeometry2D::render() const {
// TODO: get rid of intermediade mode?
if (_keyPoints.size() < 2)
return;
glBegin(GL_TRIANGLE_FAN);
glColor4ubv(_center._color.elem);
glVertex2fv(_center._position.elem);
for (std::vector<KeyPoint>::const_iterator it = _keyPoints.begin(); it != _keyPoints.end(); ++it) {
glColor4ubv(it->_color.elem);
glVertex2fv(it->_position.elem);
}
glEnd();
}