problem with glOrtho
Author
thats the thing tho, i dont want to render a 3d object in ortho projections, i just want to render the UI in ortho and the 3d in non ortho projection.
Quote:Original post by jake_Ghost
thats the thing tho, i dont want to render a 3d object in ortho projections, i just want to render the UI in ortho and the 3d in non ortho projection.
Hmm, could you post your complete rendering code? And to post a screenshot you need to upload it somewhere (any web space will do) and then link to it in your post. A screenshot would be good.
Author
this is my temp rendering stuff cause when i did it with my normal rendering, it was all messed up so i decided just to draw a textured box and see if it does the same thing
also, when i render everyting w/o the ortho stuff, it looks fine, but as soon as i render the UI it gets messed up.
#include <windows.h> // Header File For Windows#include <stdio.h> // Header File For Standard Input/Output#include <gl\gl.h> // Header File For The OpenGL32 Library#include <gl\glu.h> // Header File For The GLu32 Library#include <gl\glaux.h> // Header File For The Glaux Library#include "DrawScene.h"#include "BMP.h"#include "arb_multisample.h"int GLDraw :: DrawGLScene(GLvoid) // Here's Where We Do All The Drawing{ this->Reset(); glPushMatrix(); glTranslatef(0,0,zmove); glEnable(GL_MULTISAMPLE_ARB); glRotatef(xrot, 1.0f, 0.0f, 0.0f); glRotatef(yrot, 0.0f, 1.0f, 0.0f); this->DrawCube( bmp.GetFileName(intTexNum), 0, 0, 0, 1.0f, 1.0f, 1.0f); glDisable(GL_MULTISAMPLE_ARB); glPopMatrix(); return TRUE; // Keep Going}int GLDraw :: DrawUI(GLvoid){ POINT mousePos; GetCursorPos(&mousePos); glDisable(GL_DEPTH_TEST); glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity(); glOrtho( 0, 1024, 768, 0, -1.0f, 1.0f); glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadIdentity(); this->MapTex("Data/Interface/ui_Bag-4x4.bmp"); glBegin(GL_QUADS); glTexCoord2f( 0.0f, 1.0f); glVertex3f( mousePos.x, mousePos.y, 0.0); glTexCoord2f( 0.0f, 0.0f); glVertex3f( mousePos.x, mousePos.y + 256 , 0.0); glTexCoord2f( 1.0f, 0.0f); glVertex3f( mousePos.x + 256, mousePos.y + 256, 0.0); glTexCoord2f( 1.0f, 1.0f); glVertex3f( mousePos.x + 256, mousePos.y, 0.0); glEnd(); glMatrixMode(GL_MODELVIEW); glPopMatrix(); glMatrixMode(GL_PROJECTION); glPopMatrix(); glEnable(GL_DEPTH_TEST); return TRUE; // Keep Going}int GLDraw :: DrawLoading(GLvoid){ this->Reset(); glDisable(GL_DEPTH_TEST); glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity(); glOrtho(0,1024,0,768,-1.0f,1.0f); glMatrixMode( GL_MODELVIEW ); glPushMatrix(); glLoadIdentity(); this->MapTex("Data/Interface/ui_LoadingBar.bmp"); glBegin(GL_QUADS); glTexCoord2f(0.0f, 1.0f); glVertex3f (256.0,64.0,0.0); glTexCoord2f(0.0f, 0.0f); glVertex3f (256.0,0.0,0.0); glTexCoord2f(1.0f, 0.0f); glVertex3f (768.0,0.0,0.0); glTexCoord2f(1.0f, 1.0f); glVertex3f (768.0,64.0,0.0); glEnd(); if(LoadAt != 0) { this->MapTex("Data/Interface/ui_BarFill.bmp"); // draw main bar glBegin(GL_QUADS); glTexCoord2f(0.0f, 1.0f); glVertex3f (286.0,43.0,0.0); glTexCoord2f(0.0f, 0.0f); glVertex3f (286.0,0.0,0.0); glTexCoord2f(1.0f, 0.0f); glVertex3f (286 + (int)( (int)(450 / LOADNUM) * LoadAt),0.0,0.0); glTexCoord2f(1.0f, 1.0f); glVertex3f (286 + (int)( (int)(450 / LOADNUM) * LoadAt),43.0,0.0); glEnd(); } glMatrixMode(GL_MODELVIEW); glPopMatrix(); glMatrixMode(GL_PROJECTION); glPopMatrix(); glEnable(GL_DEPTH_TEST); //glDisable(GL_STENCIL_TEST); return TRUE; // Keep Going}GLDraw :: DrawCube(std::string TexName, GLfloat x, GLfloat y, GLfloat z, GLfloat height, GLfloat width, GLfloat depth){ this->MapTexType(TexName,FilterType); glBegin(GL_QUADS); // Front Face glTexCoord2f(0.0f, 0.0f); glVertex3f (x-width, y-height, z+depth); glTexCoord2f(1.0f, 0.0f); glVertex3f (x+width, y-height, z+depth); glTexCoord2f(1.0f, 1.0f); glVertex3f (x+width, y+height, z+depth); glTexCoord2f(0.0f, 1.0f); glVertex3f (x-width, y+height, z+depth); // Back Face glTexCoord2f(1.0f, 0.0f); glVertex3f (x-width, y-height, z-depth); glTexCoord2f(1.0f, 1.0f); glVertex3f (x-width, y+height, z-depth); glTexCoord2f(0.0f, 1.0f); glVertex3f (x+width, y+height, z-depth); glTexCoord2f(0.0f, 0.0f); glVertex3f (x+width, y-height, z-depth); // Top Face glTexCoord2f(0.0f, 1.0f); glVertex3f (x-width, y+height, z-depth); glTexCoord2f(0.0f, 0.0f); glVertex3f (x-width, y+height, z+depth); glTexCoord2f(1.0f, 0.0f); glVertex3f (x+width, y+height, z+depth); glTexCoord2f(1.0f, 1.0f); glVertex3f (x+width, y+height, -1.0f); // Bottom Face glTexCoord2f(1.0f, 1.0f); glVertex3f (x-width, y-height, z-depth); glTexCoord2f(0.0f, 1.0f); glVertex3f (x+width, y-height, z-depth); glTexCoord2f(0.0f, 0.0f); glVertex3f (x+width, y-height, z+depth); glTexCoord2f(1.0f, 0.0f); glVertex3f (x-width, y-height, z+depth); // Right face glTexCoord2f(1.0f, 0.0f); glVertex3f (x+width, y-height, z-depth); glTexCoord2f(1.0f, 1.0f); glVertex3f (x+width, y+height, z-depth); glTexCoord2f(0.0f, 1.0f); glVertex3f (x+width, y+height, z+depth); glTexCoord2f(0.0f, 0.0f); glVertex3f (x+width, y-height, z+depth); // Left Face glTexCoord2f(0.0f, 0.0f); glVertex3f (x-width, y-height, z-depth); glTexCoord2f(1.0f, 0.0f); glVertex3f (x-width, y-height, z+depth); glTexCoord2f(1.0f, 1.0f); glVertex3f (x-width, y+height, z+depth); glTexCoord2f(0.0f, 1.0f); glVertex3f (x-width, y+height, z-depth); glEnd();}GLDraw :: Reset(){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity();}void GLDraw::MapTex(const std::string &Filename) const{ glBindTexture(GL_TEXTURE_2D, bmp.Texture(Filename));}void GLDraw::MapTexType(const std::string &Filename, const int TYPE) const{ glBindTexture(GL_TEXTURE_2D, bmp.Texture(Filename,TYPE));}also, when i render everyting w/o the ortho stuff, it looks fine, but as soon as i render the UI it gets messed up.
Hrm, that does all look okay. Any chance you could upload a screenshot somewhere? If you don't have any webspace there are free (I think) image hosting sites around, I can't think of any off the top of my head though.
Author
i couldnt find a hosting thing so i used xp's publish to web thing, heres the link
http://ca.msnusers.com/JakeGhost/Documents/untitled.JPG
http://ca.msnusers.com/JakeGhost/Documents/untitled.JPG
It gives me an unauthorized access error when I try to go there. It could be my work computer so if you can't upload it somewhere else I'll check again when I get home.
It might not actually effect it, but when in Ortho mode try using glVertex2f(x,y) instead of 3f. This is how my ortho system does it, and it all works great.
Author
alrite thx to all ur help and 1 line more of code the whole messed up thing has been fixed.
every frame i reset the matrix using
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
all i had to do was add this
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
and now it works lol thx for al ur guys help
every frame i reset the matrix using
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
all i had to do was add this
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
and now it works lol thx for al ur guys help
Quote:Original post by Optus
It might not actually effect it, but when in Ortho mode try using glVertex2f(x,y) instead of 3f. This is how my ortho system does it, and it all works great.
Calling glVertex2f( x, y ) is equivelent to calling glVertex4f( x, y, 0, 1 ), for the record.
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