roland
Joined: 11 Feb 2006
Posts: 13
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 Posted: Sat Feb 25, 2006 10:10 pm Post subject: First Person Camera using sceGumLookAt.. |
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I am trying to put some sort of First Person Camera in my scene that can move in all directions..
I have sucessfully implemented the function so I can move forward and backward and also rotate left and right aswell as looking up and down..
the thing is that once I turn left or right by 90°, the up and down does not work anymore.. It works fine when I look forward or backward..
I can't find a solution on this and it's bugging me for a while now.. Anybody out there that can give me some sort of hint on this..
Below is some code to show what I am doing:
Init:
| Code: |
eye.x = 0.0f;
eye.y = -10.0f;
eye.z = 2.5f;
center.x = 0.0f;
center.y = 0.0f;
center.z = 0.0f;
up.x = 0.0f;
up.y = 0.0f;
up.z = 1.0f;
sceGumLookAt( &eye, ¢er, &up ); // Set viewpoint matrix
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and in the main loop i do:
| Code: |
sceGumMatrixMode(GU_VIEW);
sceGumLoadIdentity();
sceGumLookAt( &eye, ¢er, &up ); // Set viewpoint matrix
With the Pad Control:
if (padd & PSP_CTRL_UP) {
angle += 0.01;
angle_y = angle;
angle_z = angle;
center.z += angle_y * 2;
orientMe(-angle_z,0);
}
if (padd & PSP_CTRL_DOWN) {
angle -= 0.01;
angle_y = angle;
angle_z = angle;
center.z += angle_y * 2;
orientMe(-angle_z,0);
}
if (padd & PSP_CTRL_LEFT) {
orientMe(camspeed,0);
}
if (padd & PSP_CTRL_RIGHT) {
orientMe(-camspeed,0);
}
if (padd & PSP_CTRL_CIRCLE) {
moveMeFlat(-camspeed);
}
if (padd & PSP_CTRL_CROSS) {
moveMeFlat(camspeed);
}
void orientMe(float speed, int mode) {
ScePspFVector3 vVect;
vVect.x = center.x - eye.x;
vVect.y = center.y - eye.y;
vVect.z = center.z - eye.z;
center.y = (float)(eye.y + sinf(speed)*vVect.x + cosf(speed)*vVect.y);
center.x = (float)(eye.x + cosf(speed)*vVect.x - sinf(speed)*vVect.y);
}
void moveMeFlat(float speed) {
ScePspFVector3 vVect;
vVect.x = center.x - eye.x;
vVect.y = center.y - eye.y;
vVect.z = center.z - eye.z;
eye.x = eye.x + vVect.x * speed;
eye.y = eye.y + vVect.y * speed;
eye.z = eye.z + vVect.z * speed;
center.x = center.x + vVect.x * speed;
center.y = center.y + vVect.y * speed;
center.z = center.z + vVect.z * speed;
}
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Any help would be greatly appreciated since I am really getting frustrated :( |
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