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Fix T45034: MirrorBall rendering on wrong camera axis 

This was a mistake in the original code from D1079.

With the current way how direction ot mirror ball works camera should look
into negative Y direction. Corrected it in the camera matrix synchronization,
so no extra calculations are needed at the render time.

That's a bit annoying, but we'd better port it to the release branch, or
otherwise we'll end up with files created with wrong camera mapping after
2.75 release.
This commit is contained in:
Sergey Sharybin 2015-06-22 20:04:46 +02:00
parent 0087564b5c
commit c1cf70fbca
Notes: blender-bot 2023-02-14 11:35:46 +01:00 
Referenced by issue #45034, MirrorBall rendering on wrong camera axis
1 changed files with 28 additions and 11 deletions
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39
intern/cycles/blender/blender_camera.cpp
View File

@ -207,19 +207,34 @@ static void blender_camera_from_object(BlenderCamera *bcam, BL::RenderEngine b_e
}
}
static Transform blender_camera_matrix(const Transform& tfm, CameraType type)
static Transform blender_camera_matrix(const Transform& tfm,
const CameraType type,
const PanoramaType panorama_type)
{
Transform result;
if(type == CAMERA_PANORAMA) {
/* make it so environment camera needs to be pointed in the direction
* of the positive x-axis to match an environment texture, this way
* it is looking at the center of the texture */
result = tfm *
make_transform( 0.0f, -1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
if(panorama_type == PANORAMA_MIRRORBALL) {
/* Mirror ball camera is looking into the negative Y direction
* which matches texture mirror ball mapping.
*/
result = tfm *
make_transform(1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
}
else {
/* Make it so environment camera needs to be pointed in the direction
* of the positive x-axis to match an environment texture, this way
* it is looking at the center of the texture
*/
result = tfm *
make_transform( 0.0f, -1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
}
}
else {
/* note the blender camera points along the negative z-axis */
@ -365,7 +380,9 @@ static void blender_camera_sync(Camera *cam, BlenderCamera *bcam, int width, int
cam->bladesrotation = bcam->aperturerotation;
/* transform */
cam->matrix = blender_camera_matrix(bcam->matrix, bcam->type);
cam->matrix = blender_camera_matrix(bcam->matrix,
bcam->type,
bcam->panorama_type);
cam->motion.pre = cam->matrix;
cam->motion.post = cam->matrix;
cam->use_motion = false;
@ -424,7 +441,7 @@ void BlenderSync::sync_camera_motion(BL::Object b_ob, float motion_time)
BL::Array<float, 16> b_ob_matrix;
b_engine.camera_model_matrix(b_ob, b_ob_matrix);
Transform tfm = get_transform(b_ob_matrix);
tfm = blender_camera_matrix(tfm, cam->type);
tfm = blender_camera_matrix(tfm, cam->type, cam->panorama_type);
if(tfm != cam->matrix) {
VLOG(1) << "Camera " << b_ob.name() << " motion detected.";