ContainerRayCast - Exempt From Collision
by Scott Doerrfeld · in Torque Game Engine · 03/10/2006 (1:10 pm) · 2 replies
I have a 4-door car and I want the player to be able to walk up to any one of the car doors and open it individually. So far I have tried to achieve this by making each door a separate DTS object. I am using ContainerRayCast to cast a ray from the player's eye. The idea is if the player is facing a door and clicks the mouse, that door will open. The problem I have run into is that the first object returned from the RayCast is the car.
Ideally, I could have the car object be exempt from the RayCast. I know this can be done by passing the car object as the fourth parameter when I call ContainerRayCast, but then the RayCast will return the player object. Is there a way to have both the player AND the car object be exempt from the RayCast?
Ideally, I could have the car object be exempt from the RayCast. I know this can be done by passing the car object as the fourth parameter when I call ContainerRayCast, but then the RayCast will return the player object. Is there a way to have both the player AND the car object be exempt from the RayCast?
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#2
03/10/2006 (3:17 pm)
Thank you, Rubes. This definitely works exactly as intended! Another method I am looking at is to setup a new ObjectType for "clickable" objects that can be used for the search mask. This is described here, though this method is a bit more complex. It would be great if new object types could be created more easily! 
Torque 3D Owner Rubes
Here is the change I made to sceneObject.cc (changes highlighted in bold):
[b]// MAR: The define below was changed from 5 arguments to 6 to allow an extra exempt object.[/b] ConsoleFunction( containerRayCast, const char*, 4, [b]6[/b], "( Point3F start, Point3F end, bitset mask, SceneObject exempt1=NULL [b]SceneObject exempt2=NULL[/b])" "Cast a ray from start to end, checking for collision against items matching mask.\n\n" "If exempt is specified, then it is temporarily excluded from collision checks (For " "instance, you might want to exclude the player if said player was firing a weapon.)\n" "@returns A string containing either null, if nothing was struck, or these fields:\n" " - The ID of the object that was struck.\n" " - The x, y, z position that it was struck.\n" " - The x, y, z of the normal of the face that was struck.") { char *returnBuffer = Con::getReturnBuffer(256); Point3F start, end; dSscanf(argv[1], "%g %g %g", &start.x, &start.y, &start.z); dSscanf(argv[2], "%g %g %g", &end.x, &end.y, &end.z); U32 mask = dAtoi(argv[3]); SceneObject* pExempt = NULL; [b] SceneObject* pExempt2 = NULL; // MAR: added statement for second exempt object[/b] if (argc > 4) { U32 exemptId = dAtoi(argv[4]); Sim::findObject(exemptId, pExempt); } if (pExempt) pExempt->disableCollision(); [b] // MAR: [begin] This was added to allow for a second exempted object if (argc > 5) { U32 exemptId = dAtoi(argv[5]); Sim::findObject(exemptId, pExempt2); } if (pExempt2) pExempt2->disableCollision(); // MAR: [end] [/b] RayInfo rinfo; S32 ret = 0; if (gServerContainer.castRay(start, end, mask, &rinfo) == true) ret = rinfo.object->getId(); if (pExempt) pExempt->enableCollision(); [b] // MAR: added statement for second exempt object if (pExempt2) pExempt2->enableCollision();[/b] // add the hit position and normal? if(ret) { dSprintf(returnBuffer, 256, "%d %g %g %g %g %g %g", ret, rinfo.point.x, rinfo.point.y, rinfo.point.z, rinfo.normal.x, rinfo.normal.y, rinfo.normal.z); } else { returnBuffer[0] = '0'; returnBuffer[1] = '[[60c224ae17cbc]]'; } return(returnBuffer); }Hope that helps. I'll probably add this as a resource when I get the chance.