forked from bartvdbraak/blender
66b1dfae89
* Passes renamed to samples * Camera lens radius renamed to aperature size/blades/rotation * Glass and fresnel nodes input is now index of refraction * Glossy and velvet fresnel socket removed * Mix/add closure node renamed to mix/add shader node * Blend weight node added for shader mixing weights There is some version patching code for reading existing files, but it's not perfect, so shaders may work a bit different.
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* Perspective Camera */
|
|
|
|
__device float2 camera_sample_aperture(KernelGlobals *kg, float u, float v)
|
|
{
|
|
float blades = kernel_data.cam.blades;
|
|
|
|
if(blades == 0.0f) {
|
|
/* sample disk */
|
|
return concentric_sample_disk(u, v);
|
|
}
|
|
else {
|
|
/* sample polygon */
|
|
float rotation = kernel_data.cam.bladesrotation;
|
|
return regular_polygon_sample(blades, rotation, u, v);
|
|
}
|
|
}
|
|
|
|
__device void camera_sample_perspective(KernelGlobals *kg, float raster_x, float raster_y, float lens_u, float lens_v, Ray *ray)
|
|
{
|
|
/* create ray form raster position */
|
|
Transform rastertocamera = kernel_data.cam.rastertocamera;
|
|
float3 Pcamera = transform(&rastertocamera, make_float3(raster_x, raster_y, 0.0f));
|
|
|
|
ray->P = make_float3(0.0f, 0.0f, 0.0f);
|
|
ray->D = Pcamera;
|
|
|
|
/* modify ray for depth of field */
|
|
float aperturesize = kernel_data.cam.aperturesize;
|
|
|
|
if(aperturesize > 0.0f) {
|
|
/* sample point on aperture */
|
|
float2 lensuv = camera_sample_aperture(kg, lens_u, lens_v)*aperturesize;
|
|
|
|
/* compute point on plane of focus */
|
|
float ft = kernel_data.cam.focaldistance/ray->D.z;
|
|
float3 Pfocus = ray->P + ray->D*ft;
|
|
|
|
/* update ray for effect of lens */
|
|
ray->P = make_float3(lensuv.x, lensuv.y, 0.0f);
|
|
ray->D = normalize(Pfocus - ray->P);
|
|
}
|
|
|
|
/* transform ray from camera to world */
|
|
Transform cameratoworld = kernel_data.cam.cameratoworld;
|
|
|
|
ray->P = transform(&cameratoworld, ray->P);
|
|
ray->D = transform_direction(&cameratoworld, ray->D);
|
|
ray->D = normalize(ray->D);
|
|
|
|
#ifdef __RAY_DIFFERENTIALS__
|
|
/* ray differential */
|
|
float3 Ddiff = transform_direction(&cameratoworld, Pcamera);
|
|
|
|
ray->dP.dx = make_float3(0.0f, 0.0f, 0.0f);
|
|
ray->dP.dy = make_float3(0.0f, 0.0f, 0.0f);
|
|
|
|
ray->dD.dx = normalize(Ddiff + kernel_data.cam.dx) - normalize(Ddiff);
|
|
ray->dD.dy = normalize(Ddiff + kernel_data.cam.dy) - normalize(Ddiff);
|
|
#endif
|
|
|
|
#ifdef __CAMERA_CLIPPING__
|
|
/* clipping */
|
|
ray->P += kernel_data.cam.nearclip*ray->D;
|
|
ray->t = kernel_data.cam.cliplength;
|
|
#else
|
|
ray->t = FLT_MAX;
|
|
#endif
|
|
}
|
|
|
|
/* Orthographic Camera */
|
|
|
|
__device void camera_sample_orthographic(KernelGlobals *kg, float raster_x, float raster_y, Ray *ray)
|
|
{
|
|
/* create ray form raster position */
|
|
Transform rastertocamera = kernel_data.cam.rastertocamera;
|
|
float3 Pcamera = transform(&rastertocamera, make_float3(raster_x, raster_y, 0.0f));
|
|
|
|
ray->P = Pcamera;
|
|
ray->D = make_float3(0.0f, 0.0f, 1.0f);
|
|
|
|
/* transform ray from camera to world */
|
|
Transform cameratoworld = kernel_data.cam.cameratoworld;
|
|
|
|
ray->P = transform(&cameratoworld, ray->P);
|
|
ray->D = transform_direction(&cameratoworld, ray->D);
|
|
ray->D = normalize(ray->D);
|
|
|
|
#ifdef __RAY_DIFFERENTIALS__
|
|
/* ray differential */
|
|
ray->dP.dx = kernel_data.cam.dx;
|
|
ray->dP.dy = kernel_data.cam.dy;
|
|
|
|
ray->dD.dx = make_float3(0.0f, 0.0f, 0.0f);
|
|
ray->dD.dy = make_float3(0.0f, 0.0f, 0.0f);
|
|
#endif
|
|
|
|
#ifdef __CAMERA_CLIPPING__
|
|
/* clipping */
|
|
ray->t = kernel_data.cam.cliplength;
|
|
#else
|
|
ray->t = FLT_MAX;
|
|
#endif
|
|
}
|
|
|
|
/* Common */
|
|
|
|
__device void camera_sample(KernelGlobals *kg, int x, int y, float filter_u, float filter_v, float lens_u, float lens_v, Ray *ray)
|
|
{
|
|
/* pixel filter */
|
|
float raster_x = x + kernel_tex_interp(__filter_table, filter_u);
|
|
float raster_y = y + kernel_tex_interp(__filter_table, filter_v);
|
|
|
|
/* motion blur */
|
|
//ray->time = lerp(time_t, kernel_data.cam.shutter_open, kernel_data.cam.shutter_close);
|
|
|
|
/* sample */
|
|
if(kernel_data.cam.ortho)
|
|
camera_sample_orthographic(kg, raster_x, raster_y, ray);
|
|
else
|
|
camera_sample_perspective(kg, raster_x, raster_y, lens_u, lens_v, ray);
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|