[Adding external force to character controller]

Use the Update function to handle this. You can add lift in the jump parameter.

Ok. As a feature request, could i ask for the AddBodyForce command to be able to add Z and X forces ??? hehe

[Adding external force to character controller]

How can i add an external force to a character controller?

AddBodyForce(playerController,Vec3(0,1000000000,0),1);

Does nothing, how can i simulate some kind of air lift if i cannot add force to the character controller?

[Vehicle like collisions, any easy way?]

Fellow developers, I have made this LEO example to illustrate what is wrong:

// ====================================================================
// This file was generated by LEBuilder
// http://leadwerks.com/werkspace
// ====================================================================
#include "leo.h"
#include <string>
#include <iostream>
using namespace std;
using namespace LEO;
const int ScreenWidth = 800;
const int ScreenHeight = 600;
const char* MediaDir = "C:/Leadwerks Engine SDK";
const char* AppTitle = "Character controller bug?";
const int Group_Normal = 1;
const int Group_Mover = 2;
const int Group_Player = 3;
void ErrOut( const string& message ) { cerr << message << endl; }
// --------------------------------------------
int main( int argc, char* argv[] )
{
// Set graphics mode
Engine engine(AppTitle,ScreenWidth,ScreenHeight);
if( !engine.IsValid() )
{
ErrOut( "Failed to set graphics mode.");
return 1;
}
engine.AddAbstractPath( MediaDir );
// Create framework object and set it to a global object so other scripts can access it
Framework fw;
if( NULL == fw )
{
ErrOut( "Failed to initialize engine." );
return 1;
}
// Set Lua framework object
engine.SetObject( "fw", fw );

// Set Lua framework variable
Lua lua;
lua.PushObject( fw );
lua.SetGlobal( "fw" );
lua.Pop( 1 );
// Get framework main camera
fw.main.GetCamera().SetPosition( Vec3(0,20,-20));
fw.main.GetCamera().SetRotation( Vec3(45,0,0));
// Create cube
TBody cubeBody=CreateBodyBox(2,2,2);
PositionEntity(cubeBody,Vec3(-3,5,-3));
// Create ground
TBody groundBody=CreateBodyBox(20,2,20);
PositionEntity(groundBody,Vec3(0,-3,0));
//Create elevator
TBody elevatorBody=CreateBodyBox(8,2,8);
PositionEntity(elevatorBody,Vec3(0,0,0));
SetBodyGravityMode(elevatorBody,false);
//Create player
TController playerController=CreateController(7.5,1.5,0.5,45,5);
PositionEntity(playerController,Vec3(3,5,3),1);
//Assign types
EntityType(cubeBody,Group_Normal);
EntityType(groundBody,Group_Normal);
EntityType(elevatorBody,Group_Mover);
EntityType(playerController,Group_Player);
//Assign mass
SetBodyMass(groundBody,0);
SetBodyMass(cubeBody,1);
SetBodyMass(elevatorBody,1000);
SetBodyMass(playerController,5);
//Set collisions
SetWorldGravity(Vec3(0,-15,0));
Collisions::Set(Group_Normal,Group_Normal,SLIDINGCOLLISION);
Collisions::Set(Group_Normal,Group_Mover,SLIDINGCOLLISION);
Collisions::Set(Group_Normal,Group_Player,SLIDINGCOLLISION);
Collisions::Set(Group_Mover,Group_Mover,SLIDINGCOLLISION);
Collisions::Set(Group_Mover,Group_Player,SLIDINGCOLLISION);
Collisions::Set(Group_Player,Group_Player,SLIDINGCOLLISION);
DebugPhysics();
// Spin cube until user hits Escape
while( !Keyboard::I****() && !engine.IsTerminated() )
{
if( !engine.IsSuspended() )
{
UpdateWorld();
//Update character controller
float move=(KeyDown(KEY_W)-KeyDown(KEY_S))*10;
float strafe=(KeyDown(KEY_D)-KeyDown(KEY_A))*10;
float jump=0.0;
if (KeyHit(KEY_LSHIFT)) {
if (!ControllerAirborne(playerController)) {
 jump=15.0;
}
}
UpdateController(playerController,0.0,move,strafe,jump,20);
//Add mover velocity
if(KeyDown(KEY_LCONTROL)){
AddBodyForce(elevatorBody,Vec3(0,4000,0),1);
}
if(KeyDown(KEY_SPACE)){
AddBodyForce(elevatorBody,Vec3(0,-4000,0),1);
}
if(KeyDown(KEY_RIGHT)){
AddBodyForce(elevatorBody,Vec3(4000,0,0),1);
}
if(KeyDown(KEY_LEFT)){
AddBodyForce(elevatorBody,Vec3(-4000,0,0),1);
}
if(KeyDown(KEY_UP)){
AddBodyForce(elevatorBody,Vec3(0,0,4000),1);
}
if(KeyDown(KEY_DOWN)){
AddBodyForce(elevatorBody,Vec3(0,0,-4000),1);
}
//This fixes the controller
if(KeyDown(KEY_X)){
RotateEntity(playerController,Vec3(0.5,0,0),1);
}
SetBodyTorque(elevatorBody,Vec3(0,0,0),1);
RotateEntity(elevatorBody,Vec3(0,0,0),1);
fw.Update();
fw.Render();
DrawText(20,20,"Use Arrow keys to move platform around, use Ctrl and Space to move up and down");
DrawText(20,40,"Use W,A,S,D to move character controller around. Use LShift to jump");
DrawText(20,60,"Character controller does not move along, press X to apply solution");
engine.Flip(1);
}
}

return engine.Free();
}

 

Run it and see it yourselves. The character controller does not move accordingly unless it is rotated slightly. dont know if there is another way but that works, for now...

 

Video of this program in action, I press X on second 60, and you can see it now behaves the way it should. All pressing x does is:

//This fixes the controller
if(KeyDown(KEY_X)){
RotateEntity(playerController,Vec3(0.5,0,0),1);
}

 

 

Can this be considered a real bug?

[Vehicle like collisions, any easy way?]

Yes, that is the solution, but i was getting some weird bugs. This is the way I am doing it right now and it works... Kinda...

 

I added the callback function:

int _stdcall moverCollision( TEntity entity0, TEntity entity1, byte* position, byte* normal, byte* force, flt speed )
{
flag = GetEntityType(entity1);
PositionEntity(entity1,
 (EntityPosition(entity1,1)-EntityPosition(entity0,1))+
 EntityPosition(entity0,1),1);

   return 0;
}

 

And it works Great with normal bodies. But it does not work with character controllers unless you rotate it on X or Z axis by at least one degree....

[Vehicle like collisions, any easy way?]

Guys guys, you are explaining it right and i know what you mean, something like a seat in a vehicle a static object linked to other, that is not what i mean or want, Here is a video that ilustrates what i am trying to acomplish:

 

 

One player gets IN the vehicle to pilot it, (No character controller as you all are saying, static, inside the vehicle) BUT, the other player gets ON the vehicle (On top, not on a seat, and can move freely on top of it dynamically and can simply walk or jump off, nothing scripted, but the vehicle still moves him). THAT is what i want to achieve.

 

As an experiment, open up the editor, spawn a viperscout vehicle with physics paused, press the "switch to game" button while on top of it, and if the vehicle starts moving, you will stay in the same spot as the vehicle slides below you. this is the default behavior and is not what i want.

 

Here is my progress so far:

http://www.youtube.com/watch?v=5mmUf2fwsEs

 

As you can see, the character controller just slides, but the box does move around with the platform. And this does not happen with default settings! go ahead and try it and see what i am talking about.

[Vehicle like collisions, any easy way?]

This will work for some of those situations:

http://www.leadwerks...rence/vehicles/

 

Yes, those commands do help in a normal vehicle situation, but what i'm trying to do, is for a person who does not "Get in" the vehicle, to also be able to get a ride, like standing on top of the vehicle's roof, and get carried along. I have replicated the effect for normal objects, but not with character controllers.

[Vehicle like collisions, any easy way?]

I've gotten to a point where i need vehicle-like entities, such as an elevator or a boat. I've had no problem implementing an elevator, but i do have a problem with boat and car-like entities.

 

The problem is, when an entity moves on either X or Z axis (sides), any object on top, or any character controller, does not move along with it, it stays in the same position it was before.

 

I know it can be done with a collision callback function and i do know how it is done, but, is there any easy, fast way to achieve this effect?

 

Edit:

 

Ok, so i went ahead and did it the callback way, added a callback function:

int _stdcall moverCollision( TEntity entity0, TEntity entity1, byte* position, byte* normal, byte* force, flt speed )
{
AddBodyForce(entity1,GetBodyVelocity(entity0,1));
return 0;
}

 

and set the callback function:

SetEntityCallback(elevatorBody,(BP)moverCollision,ENTITYCALLBACK_COLLISION);

 

And it works GREAT with normal bodies, but not with character controllers... any suggestion? I already tried with UpdateController to no avail.

 

Will i have to create my own character controller?

[Scrolling and scaling textures, How is it done?]

Great! Thank you so much for pointing me in the right direction Josh. For anyone who is interested, i managed to get the results i wanted.

 

Since i use the "mesh.vert" shader on most of the objects, i went to experiment with it. I first renamed shaders.pak to shaders.zip to access the shaders. I added scale and offset uniform variables:

uniform vec2 texscale = vec2(1.0,1.0);;
uniform vec2 texoffset;

 

and modified two lines of code to add, and multiply the texcoords:

texcoord0=gl_MultiTexCoord0.xy*texscale+texoffset;
texcoord1=gl_MultiTexCoord1.xy*texscale+texoffset;

 

To access, scale and offset textures i use:

SetShaderVec2(shader,"texscale",Vec2(scaleU,scaleV));
SetShaderVec2(shader,"texoffset",Vec2(scrollU,scrollV));

 

 

And it works great. Any suggestions or questions are welcome.

 

Note that this will affect the material you grabbed the shader of, using:

TShader shader=GetMaterialShader(yourMaterial);

[Scrolling and scaling textures, How is it done?]

Yes, i think it can be done with a shader too, i will continue investigating and see what i can come up with.

[Scrolling and scaling textures, How is it done?]

Yes, those functions do return the texture width and height, but it does not allow me to change it. Its some sort of getter from what i see

[Scrolling and scaling textures, How is it done?]

I have been trying to scale a texture on a cube, but i'm not having luck so far. Is there any way i can access the UV mapping and change it ingame to scale the texture? (repeating textures)

 

Thank you all, I already solved the problem. Solution is below on post #8.