opengl - Got points with white borders when drowning circle via gldrawarrays and GL_POINTS -

-

i'm trying draw circle opengl using gldrawarrays , gl_points. circle drawn correct, each point has got white border (see screenshot).

screenshot

here code:

glenable(gl_blend); glblendfunc(gl_src_alpha,gl_one_minus_src_alpha); glenable(gl_point_smooth); glhint(gl_point_smooth_hint, gl_nicest);  color* color = (color*)colors;  glenableclientstate(gl_vertex_array); pointsize *= this->getscale();  glpointsize(pointsize); glcolor4f(color->r/255.0f, color->g/255.0f, color->b/255.0f, 1.0f);  glvertexpointer(2, gl_float, 0, verts); gldrawarrays(gl_points, 0, count); gldisableclientstate(gl_vertex_array);

i think, something's wrong blending mode, can't find right one. suggestions?

i believe gl_point_smooth intended used saturation blending glblendfunc(gl_src_alpha_saturate, gl_one) alpha calculated portion of pixel sprite overlaps. depth buffer may interfere rendering too.

for more accurate circle i'd suggest using triangle strip, or single textured or (if using shaders, implicitly coloured in fragment shader) quad.


Comments

Post a Comment

Popular posts from this blog

c++ - Linked List error when inserting for the last time -

-
so have part of code here this loop 5 times (max = 5) insert word link list. for ( int = 0 ; < max ; i++ ) { string alphabet = g->returnalphabets(); l[i]->addwords(alphabet[i]); } and have insert word part here string line; fstream myfile ("words.txt"); while (!myfile.eof()) { getline(myfile,line); if ( alphabet == line[0] ) { listnode *newnode = new listnode; if ( head == null ) { newnode->item = alphabet; newnode->next = null; head = newnode; } else { newnode->item = line; prev = cur; prev->next = newnode; } cur = newnode; } } myfile.close(); my problem gives me error on last loop. meaning on max = 4, insert node. rest of loop fine. when decrease max 4 meaning loop 4 times, program error-free when program loops 5 times gives error. anyone can poin...
Read more

java - activate/deactivate sonar maven plugin by profile? -

-
i use sonar plugin executes if activated in maven profile. sonar runs on every compile. the problem build fail other team members not have sonar application installed locally. pom.xml checked in team members same copy including sonar configuration, don't want them modify purpose of disabling sonar (they might inadvertently check modified copy in). please advise how configure maven (.m2/settings.xml) and/or pom.xml sonar feature can enabled/disabled local profile. here sonar configuration in each project's pom.xml: <plugin> <groupid>org.codehaus.mojo</groupid> <artifactid>sonar-maven-plugin</artifactid> <version>1.0</version> <executions> <execution> <id>make-sonar</id> <phase>compile</phase> <goals> <goal>sonar</goal> </goals> </execution> </executions> ...
Read more

java - What is the difference between String. and String.this. ? -

-
this question has answer here: meaning of .this , .class in java 2 answers i'll straight point. im still learning bit of syntax , want know difference between code is code a: public class buttonz extends jbutton{ public buttonz(){ settext(new string(string.valueof(i))); } } please ignore fact i undeclared, not lost. code b: public class buttonz extends jbutton{ public buttonz(){ settext(new string(string.this.charat(i))); } } what don't yet understand difference in typing string.this , string. i under assumption when use dot operator on class accessing it's static methods(and/or variables if they're not hidden). i have studied little bit , have concluded when using string. accessing string static methods.. when using string.this. i'm accessing methods class buttonz extendi...
Read more