camera movement problems
Author
Hi!
I'm having some difficulties with my camera movements.
Here's what I'm using in my code:
float camPosX = 0;
float camPosY = 10;
float camPosZ = 1;
float camViewX = 0;
float camViewY = 10;
float camViewZ = 10;
float camUpX = 0;
float camUpY = 1;
float camUpZ = 0;
In init():
gluPerspective(45.0,
800/600,
1,
500);
In Main_Loop(): (Yes, using GLFW)
if(glfwGetKey(GLFW_KEY_UP) == GLFW_PRESS)
{
camPosX = camPosX + (camViewX - camPosX) * moveSpeed;
camPosZ = camPosZ + (camViewZ - camPosZ) * moveSpeed;
camViewX = camViewX + (camViewX - camPosX) * moveSpeed;
camViewZ = camViewZ + (camViewZ - camPosZ) * moveSpeed;
}
In Draw():
gluLookAt(camPosX,camPosY,camPosZ,
camViewX,camViewY,camViewZ,
camUpX,camUpY,camUpZ);
Now, my problem is - when I first press the up arrow key, the camera leaps forward, and then it slows down....untill it's come to a complete stop.
After that I can't move it at all. (Maybe the camPosZ- and camViewZ-variables has somehow gotten the same value?)
Any help is greatly apprechiated:)
try this
float diffX = camViewX - camPosX;
float diffZ = camViewZ - camPosZ;
camPosX = camPosX + diffX * moveSpeed;
camPosZ = camPosZ + diffZ * moveSpeed;
camViewX = camViewX + diffX * moveSpeed;
camViewZ = camViewZ + diffZ * moveSpeed;
it should help, i think
float diffX = camViewX - camPosX;
float diffZ = camViewZ - camPosZ;
camPosX = camPosX + diffX * moveSpeed;
camPosZ = camPosZ + diffZ * moveSpeed;
camViewX = camViewX + diffX * moveSpeed;
camViewZ = camViewZ + diffZ * moveSpeed;
it should help, i think
Quote:Original post by C3rial
camPosX = camPosX + (camViewX - camPosX) * moveSpeed;
camPosZ = camPosZ + (camViewZ - camPosZ) * moveSpeed;
camViewX = camViewX + (camViewX - camPosX) * moveSpeed;
camViewZ = camViewZ + (camViewZ - camPosZ) * moveSpeed;
The way the new positions are calculated, the camPos will slowly get closer to the viewPos. So, the camera will eventually slow to a stop.
Try something like:
float xMove = (camViewX - camPosX) * moveSpeed;float zMove = (camViewZ - camPosZ) * moveSpeed;camPosX = camPosX + xMove;camPosZ = camPosZ + zMove;camViewX = camViewX + xMove;camViewZ = camViewZ + zMove;that way the amount to move camView will not be calculated differently from the amount to move camPos.
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