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Diffstat (limited to 'intern/cycles/blender/blender_camera.cpp')
| -rw-r--r-- | intern/cycles/blender/blender_camera.cpp | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/intern/cycles/blender/blender_camera.cpp b/intern/cycles/blender/blender_camera.cpp new file mode 100644 index 00000000000..2a2c2a7c643 --- /dev/null +++ b/intern/cycles/blender/blender_camera.cpp @@ -0,0 +1,290 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "camera.h" +#include "scene.h" + +#include "blender_sync.h" +#include "blender_util.h" + +CCL_NAMESPACE_BEGIN + +/* Blender Camera Intermediate: we first convert both the offline and 3d view + * render camera to this, and from there convert to our native camera format. */ + +struct BlenderCamera { + float nearclip; + float farclip; + + bool ortho; + float ortho_scale; + + float lens; + + float aperturesize; + uint apertureblades; + float aperturerotation; + float focaldistance; + + float2 shift; + float2 offset; + float zoom; + + float2 pixelaspect; + + enum { AUTO, HORIZONTAL, VERTICAL } sensor_fit; + float sensor_width; + float sensor_height; + + Transform matrix; +}; + +static void blender_camera_init(BlenderCamera *bcam) +{ + memset(bcam, 0, sizeof(BlenderCamera)); + + bcam->zoom = 1.0f; + bcam->pixelaspect = make_float2(1.0f, 1.0f); + bcam->sensor_width = 32.0f; + bcam->sensor_height = 18.0f; + bcam->sensor_fit = BlenderCamera::AUTO; +} + +static float blender_camera_focal_distance(BL::Object b_ob, BL::Camera b_camera) +{ + BL::Object b_dof_object = b_camera.dof_object(); + + if(!b_dof_object) + return b_camera.dof_distance(); + + /* for dof object, return distance along camera direction. this is + * compatible with blender, but does it fit our dof model? */ + Transform obmat = get_transform(b_ob.matrix_world()); + Transform dofmat = get_transform(b_dof_object.matrix_world()); + + float3 cam_p = transform_get_column(&obmat, 3); + float3 cam_dir = normalize(transform_get_column(&obmat, 2)); + float3 dof_p = transform_get_column(&dofmat, 3); + float3 proj_p = dot(dof_p, cam_dir) * cam_dir; + + return len(proj_p - cam_p); +} + +static void blender_camera_from_object(BlenderCamera *bcam, BL::Object b_ob) +{ + BL::ID b_ob_data = b_ob.data(); + + if(b_ob_data.is_a(&RNA_Camera)) { + BL::Camera b_camera(b_ob_data); + PointerRNA ccamera = RNA_pointer_get(&b_camera.ptr, "cycles"); + + bcam->nearclip = b_camera.clip_start(); + bcam->farclip = b_camera.clip_end(); + + bcam->ortho = (b_camera.type() == BL::Camera::type_ORTHO); + bcam->ortho_scale = b_camera.ortho_scale(); + + bcam->lens = b_camera.lens(); + bcam->aperturesize = RNA_float_get(&ccamera, "aperture_size"); + bcam->apertureblades = RNA_int_get(&ccamera, "aperture_blades"); + bcam->aperturerotation = RNA_float_get(&ccamera, "aperture_rotation"); + bcam->focaldistance = blender_camera_focal_distance(b_ob, b_camera); + + bcam->shift.x = b_camera.shift_x(); + bcam->shift.y = b_camera.shift_y(); + + bcam->sensor_width = b_camera.sensor_width(); + bcam->sensor_height = b_camera.sensor_height(); + + if(b_camera.sensor_fit() == BL::Camera::sensor_fit_AUTO) + bcam->sensor_fit = BlenderCamera::AUTO; + else if(b_camera.sensor_fit() == BL::Camera::sensor_fit_HORIZONTAL) + bcam->sensor_fit = BlenderCamera::HORIZONTAL; + else + bcam->sensor_fit = BlenderCamera::VERTICAL; + } + else { + /* from lamp not implemented yet */ + } +} + +static void blender_camera_sync(Camera *cam, BlenderCamera *bcam, int width, int height) +{ + /* copy camera to compare later */ + Camera prevcam = *cam; + + /* dimensions */ + float xratio = width*bcam->pixelaspect.x; + float yratio = height*bcam->pixelaspect.y; + + /* compute x/y aspect and ratio */ + float aspectratio, xaspect, yaspect; + + /* sensor fitting */ + bool horizontal_fit; + float sensor_size; + + if(bcam->sensor_fit == BlenderCamera::AUTO) { + horizontal_fit = (xratio > yratio); + sensor_size = bcam->sensor_width; + } + else if(bcam->sensor_fit == BlenderCamera::HORIZONTAL) { + horizontal_fit = true; + sensor_size = bcam->sensor_width; + } + else { + horizontal_fit = false; + sensor_size = bcam->sensor_height; + } + + if(horizontal_fit) { + aspectratio= xratio/yratio; + xaspect= aspectratio; + yaspect= 1.0f; + } + else { + aspectratio= yratio/xratio; + xaspect= 1.0f; + yaspect= aspectratio; + } + + /* modify aspect for orthographic scale */ + if(bcam->ortho) { + xaspect = xaspect*bcam->ortho_scale/(aspectratio*2.0f); + yaspect = yaspect*bcam->ortho_scale/(aspectratio*2.0f); + aspectratio = bcam->ortho_scale/2.0f; + } + + /* set viewplane */ + cam->left = -xaspect; + cam->right = xaspect; + cam->bottom = -yaspect; + cam->top = yaspect; + + /* zoom for 3d camera view */ + cam->left *= bcam->zoom; + cam->right *= bcam->zoom; + cam->bottom *= bcam->zoom; + cam->top *= bcam->zoom; + + /* modify viewplane with camera shift and 3d camera view offset */ + float dx = 2.0f*(aspectratio*bcam->shift.x + bcam->offset.x*xaspect*2.0f); + float dy = 2.0f*(aspectratio*bcam->shift.y + bcam->offset.y*yaspect*2.0f); + + cam->left += dx; + cam->right += dx; + cam->bottom += dy; + cam->top += dy; + + /* clipping distances */ + cam->nearclip = bcam->nearclip; + cam->farclip = bcam->farclip; + + /* orthographic */ + cam->ortho = bcam->ortho; + + /* perspective */ + cam->fov = 2.0f*atan((0.5f*sensor_size)/bcam->lens/aspectratio); + cam->focaldistance = bcam->focaldistance; + cam->aperturesize = bcam->aperturesize; + cam->blades = bcam->apertureblades; + cam->bladesrotation = bcam->aperturerotation; + + /* transform, note the blender camera points along the negative z-axis */ + cam->matrix = bcam->matrix * transform_scale(1.0f, 1.0f, -1.0f); + + /* set update flag */ + if(cam->modified(prevcam)) + cam->tag_update(); +} + +/* Sync Render Camera */ + +void BlenderSync::sync_camera(int width, int height) +{ + BlenderCamera bcam; + blender_camera_init(&bcam); + + /* pixel aspect */ + BL::RenderSettings r = b_scene.render(); + + bcam.pixelaspect.x = r.pixel_aspect_x(); + bcam.pixelaspect.y = r.pixel_aspect_y(); + + /* camera object */ + BL::Object b_ob = b_scene.camera(); + + if(b_ob) { + blender_camera_from_object(&bcam, b_ob); + bcam.matrix = get_transform(b_ob.matrix_world()); + } + + /* sync */ + Camera *cam = scene->camera; + blender_camera_sync(cam, &bcam, width, height); +} + +/* Sync 3D View Camera */ + +void BlenderSync::sync_view(BL::SpaceView3D b_v3d, BL::RegionView3D b_rv3d, int width, int height) +{ + BlenderCamera bcam; + blender_camera_init(&bcam); + + /* 3d view parameters */ + bcam.nearclip = b_v3d.clip_start(); + bcam.farclip = b_v3d.clip_end(); + bcam.lens = b_v3d.lens(); + + if(b_rv3d.view_perspective() == BL::RegionView3D::view_perspective_CAMERA) { + /* camera view */ + BL::Object b_ob = b_scene.camera(); + + if(b_ob) { + blender_camera_from_object(&bcam, b_ob); + + /* magic zoom formula */ + bcam.zoom = (float)b_rv3d.view_camera_zoom(); + bcam.zoom = (1.41421f + bcam.zoom/50.0f); + bcam.zoom *= bcam.zoom; + bcam.zoom = 2.0f/bcam.zoom; + + /* offset */ + bcam.offset = get_float2(b_rv3d.view_camera_offset()); + } + } + else if(b_rv3d.view_perspective() == BL::RegionView3D::view_perspective_ORTHO) { + /* orthographic view */ + bcam.farclip *= 0.5; + bcam.nearclip = -bcam.farclip; + + bcam.ortho = true; + bcam.ortho_scale = b_rv3d.view_distance(); + } + + bcam.zoom *= 2.0f; + + /* 3d view transform */ + bcam.matrix = transform_inverse(get_transform(b_rv3d.view_matrix())); + + /* sync */ + blender_camera_sync(scene->camera, &bcam, width, height); +} + +CCL_NAMESPACE_END + |