### character collision opengl/glut

Hi guys, i'm having trouble with adding collision detection for my character.Basically what i have is a few walls(created in glut) ,and a character imported from an obj file created in 3ds max. I add bounded boxes to them but here is where i have a problem. When i draw my character, i create a box around him. But even if i move my character the box stays in the same place , even though i call the function every frame. What seems to be the problem , what am i calculating/doing wrong ? I'll post the code below, thank you.

 ``123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149`` ``````//bounding boxes struct BoundingBox { Vector3D max; Vector3D min; }; BoundingBox *box_mo; BoundingBox *static_box[400]; void initbox(BoundingBox *b){ b->min.x=100000; b->min.y=100000; b->min.z=100000; b->max.x=-100000; b->max.y=-100000; b->max.z=-100000; } BoundingBox *CreateCollisionBox(GLMmodel *model,GLMgroup *object){ /* GLM doesn't store each vertex together with the object that owns it. It doesn't have that notion. In GLM object don't have vertex, they have triangles. And each triangle is actually an index in the triangle list of the object.*/ BoundingBox *boxx=(BoundingBox*)malloc(sizeof(BoundingBox)); initbox(boxx); for(int i=0;inumtriangles;i++){ // for each vertex of the triangle pmodel1->triangles[object->triangles[i]] // calculate min and max for(int j=0;j<3;j++){ GLuint index=model->triangles[object->triangles[i]].vindices[j]; GLfloat x = model->vertices[index*3 +0]; GLfloat y = model->vertices[index*3 +1]; GLfloat z = model->vertices[index*3 +2]; if(boxx->min.x>x) boxx->min.x =x; if(boxx->min.y>y) boxx->min.y =y; if(boxx->min.z>z) boxx->min.z =z; if(boxx->max.xmax.x =x; if(boxx->max.ymax.y =y; if(boxx->max.zmax.z =z; } } return boxx; } void AddCollisionBox(GLMmodel *model,GLMgroup *object){ //box[boxindex]=CreateCollisionBox(model,object); box_mo=CreateCollisionBox(model,object); //boxindex++; } // A GLMmodel has a chained list of groups, each group representing an object. // Each object has a name (the name you gave it in 3D Studio Max or Gmax). // Let's you have 10 walls in your scene a few other objects as well and you want to // create collision boxes just for the walls and you do not want to make a collision box // for one of your objects. You could name all your walls // like this: Wall1, Wall2, ..., Wall10. If you wanted to add collision boxes just to them // you could go through all objects in the scene and if their name contains "Wall" add them. // with this one: strstr // Basicly this function does just that: if you want to add boxes for the walls you would call it like this: DefineCollisionBoxes(model,"Wall"); void DefineCollisionBoxes(GLMmodel *model,char *name){ GLMgroup *group = model->groups; while(group){ if(strstr(group->name,name)) AddCollisionBox(model,group); group=group->next; } } bool Collision(BoundingBox *b,GLfloat x,GLfloat y,GLfloat z){ return x <= b->max.x && x>= b->min.x && y<= b->max.y && y>= b->min.y && z<= b->max.z && z >= b->min.z; } bool CollisionTest(BoundingBox *a,BoundingBox *b){ /*bool collision=false; for(int i=0;imin.x, y=static_box[i]->min.y,z=static_box[i]->min.z ;x<=static_box[i]->max.x && y<=static_box[i]->max.y && z<=static_box[i]->max.z;x+=0.1,y+=0.1,z+=0.1){ if(Collision(a,x,y,z) == true) collision=true; } } return collision;*/ if(a->min.x <= b->max.x && a->max.x >= b->min.x && a->min.z <= b->max.z && a->max.z >= b->min.z && a->min.y <= b->max.y && a->max.y >= b->min.y) return true; return false; } void drawBox(BoundingBox *b){ glColor3f(1,1,1); glBegin(GL_LINE_LOOP); glVertex3f(b->max.x,b->max.y,b->min.z); glVertex3f(b->min.x,b->max.y,b->min.z); glVertex3f(b->min.x,b->min.y,b->min.z); glVertex3f(b->max.x,b->min.y,b->min.z); glEnd(); glBegin(GL_LINE_LOOP); glVertex3f(b->max.x,b->min.y,b->max.z); glVertex3f(b->max.x,b->max.y,b->max.z); glVertex3f(b->min.x,b->max.y,b->max.z); glVertex3f(b->min.x,b->min.y,b->max.z); glEnd(); glBegin(GL_LINE_LOOP); glVertex3f(b->max.x,b->max.y,b->min.z); glVertex3f(b->max.x,b->max.y,b->max.z); glVertex3f(b->min.x,b->max.y,b->max.z); glVertex3f(b->min.x,b->max.y,b->min.z); glEnd(); glBegin(GL_LINE_LOOP); glVertex3f(b->max.x,b->min.y,b->max.z); glVertex3f(b->min.x,b->min.y,b->max.z); glVertex3f(b->min.x,b->min.y,b->min.z); glVertex3f(b->max.x,b->min.y,b->min.z); glEnd(); } //display function void display(){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //setup view glMatrixMode(GL_MODELVIEW); glLoadIdentity(); camera.render //read from file, create walls and characters //place model mo in front of the third person camera always Vector3D positionn; positionn = camera.position + camera.forward*5; glPushMatrix(); glColor3f(0.88f,0.75f,0.49f); //here i move my character and calculate bounding box at each frame for him glTranslatef(positionn.x,-0.42f,positionn.z); glScalef(0.7f,0.7f,0.7f); glRotatef(angle,0,1,0); drawMo(); DefineCollisionBoxes(pmodel1,"body"); // actual function call drawBox(box_mo); //draw bounding box glPopMatrix(); //test if the character collides with any of the walls - not working for(int i=0;i
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