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POCamera rotation (OpenGL)
 

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  1. POCamera rotation (OpenGL)
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    <p>I am having trouble with a camera class I am trying to use in my program. When I change the camera_target of the gluLookAt call, my whole terrain is rotating instead of just the camera rotating like it should.</p> <p>Here is some code from my render method:</p> <pre><code>camera-&gt;Place(); ofSetColor(255, 255, 255, 255); //draw axis lines //x-axis glBegin(GL_LINES); glColor3f(1.0f,0.0f,0.0f); glVertex3f(0.0f,0.0f,0.0f); glVertex3f(100.0f, 0.0f,0.0f); glEnd(); //y-axis glBegin(GL_LINES); glColor3f(0.0f,1.0f,0.0f); glVertex3f(0.0f,0.0f,0.0f); glVertex3f(0.0f, 100.0f,0.0f); glEnd(); //z-axis glBegin(GL_LINES); glColor3f(0.0f,0.0f,1.0f); glVertex3f(0.0f,0.0f,0.0f); glVertex3f(0.0f, 0.0f,100.0f); glEnd(); glColor3f(1,1,1); terrain-&gt;Draw(); </code></pre> <p>And the rotate and place methods from my camera class:</p> <pre><code>void Camera::RotateCamera(float h, float v){ hRadians += h; vRadians += v; cam_target.y = cam_position.y+(float)(radius*sin(vRadians)); cam_target.x = cam_position.x+(float)(radius*cos(vRadians)*cos(hRadians)); cam_target.z = cam_position.z+(float)(radius*cos(vRadians)*sin(hRadians)); cam_up.x = cam_position.x-cam_target.x; cam_up.y = ABS(cam_position.y+(float)(radius*sin(vRadians+PI/2))) ; cam_up.z = cam_position.z-cam_target.z; } void Camera::Place() { //position, camera target, up vector gluLookAt(cam_position.x, cam_position.y, cam_position.z, cam_target.x, cam_target.y, cam_target.z, cam_up.x, cam_up.y, cam_up.z); } </code></pre> <p>The problem is that the whole terrain is moving around the camera, whereas the camera should just be rotating.</p> <p>Thanks for any help!</p> <p>EDIT - Found some great tutorials and taking into account the answers on here, I make a better camera class. Thanks guys</p>
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    1. COIn opengl - I thought the camera was fixed and you rotated the terrain?
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    2. COI thought the gluLookAt would take care of that.
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    3. COIn Soviet Russia, Camera rotates YOU!
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