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-rw-r--r--intern/cycles/kernel/geom/geom_primitive.h351
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diff --git a/intern/cycles/kernel/geom/geom_primitive.h b/intern/cycles/kernel/geom/geom_primitive.h
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--- a/intern/cycles/kernel/geom/geom_primitive.h
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-/*
- * Copyright 2011-2013 Blender Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/* Primitive Utilities
- *
- * Generic functions to look up mesh, curve and volume primitive attributes for
- * shading and render passes. */
-
-#pragma once
-
-#include "kernel/kernel_projection.h"
-
-CCL_NAMESPACE_BEGIN
-
-/* Surface Attributes
- *
- * Read geometry attributes for surface shading. This is distinct from volume
- * attributes for performance, mainly for GPU performance to avoid bringing in
- * heavy volume interpolation code. */
-
-ccl_device_inline float primitive_surface_attribute_float(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc,
- ccl_private float *dx,
- ccl_private float *dy)
-{
- if (sd->type & PRIMITIVE_ALL_TRIANGLE) {
- if (subd_triangle_patch(kg, sd) == ~0)
- return triangle_attribute_float(kg, sd, desc, dx, dy);
- else
- return subd_triangle_attribute_float(kg, sd, desc, dx, dy);
- }
-#ifdef __HAIR__
- else if (sd->type & PRIMITIVE_ALL_CURVE) {
- return curve_attribute_float(kg, sd, desc, dx, dy);
- }
-#endif
- else {
- if (dx)
- *dx = 0.0f;
- if (dy)
- *dy = 0.0f;
- return 0.0f;
- }
-}
-
-ccl_device_inline float2 primitive_surface_attribute_float2(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc,
- ccl_private float2 *dx,
- ccl_private float2 *dy)
-{
- if (sd->type & PRIMITIVE_ALL_TRIANGLE) {
- if (subd_triangle_patch(kg, sd) == ~0)
- return triangle_attribute_float2(kg, sd, desc, dx, dy);
- else
- return subd_triangle_attribute_float2(kg, sd, desc, dx, dy);
- }
-#ifdef __HAIR__
- else if (sd->type & PRIMITIVE_ALL_CURVE) {
- return curve_attribute_float2(kg, sd, desc, dx, dy);
- }
-#endif
- else {
- if (dx)
- *dx = make_float2(0.0f, 0.0f);
- if (dy)
- *dy = make_float2(0.0f, 0.0f);
- return make_float2(0.0f, 0.0f);
- }
-}
-
-ccl_device_inline float3 primitive_surface_attribute_float3(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc,
- ccl_private float3 *dx,
- ccl_private float3 *dy)
-{
- if (sd->type & PRIMITIVE_ALL_TRIANGLE) {
- if (subd_triangle_patch(kg, sd) == ~0)
- return triangle_attribute_float3(kg, sd, desc, dx, dy);
- else
- return subd_triangle_attribute_float3(kg, sd, desc, dx, dy);
- }
-#ifdef __HAIR__
- else if (sd->type & PRIMITIVE_ALL_CURVE) {
- return curve_attribute_float3(kg, sd, desc, dx, dy);
- }
-#endif
- else {
- if (dx)
- *dx = make_float3(0.0f, 0.0f, 0.0f);
- if (dy)
- *dy = make_float3(0.0f, 0.0f, 0.0f);
- return make_float3(0.0f, 0.0f, 0.0f);
- }
-}
-
-ccl_device_forceinline float4 primitive_surface_attribute_float4(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc,
- ccl_private float4 *dx,
- ccl_private float4 *dy)
-{
- if (sd->type & PRIMITIVE_ALL_TRIANGLE) {
- if (subd_triangle_patch(kg, sd) == ~0)
- return triangle_attribute_float4(kg, sd, desc, dx, dy);
- else
- return subd_triangle_attribute_float4(kg, sd, desc, dx, dy);
- }
-#ifdef __HAIR__
- else if (sd->type & PRIMITIVE_ALL_CURVE) {
- return curve_attribute_float4(kg, sd, desc, dx, dy);
- }
-#endif
- else {
- if (dx)
- *dx = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
- if (dy)
- *dy = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
- return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
- }
-}
-
-#ifdef __VOLUME__
-/* Volume Attributes
- *
- * Read geometry attributes for volume shading. This is distinct from surface
- * attributes for performance, mainly for GPU performance to avoid bringing in
- * heavy volume interpolation code. */
-
-ccl_device_inline bool primitive_is_volume_attribute(ccl_private const ShaderData *sd,
- const AttributeDescriptor desc)
-{
- return sd->type == PRIMITIVE_VOLUME;
-}
-
-ccl_device_inline float primitive_volume_attribute_float(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc)
-{
- if (primitive_is_volume_attribute(sd, desc)) {
- return volume_attribute_value_to_float(volume_attribute_float4(kg, sd, desc));
- }
- else {
- return 0.0f;
- }
-}
-
-ccl_device_inline float3 primitive_volume_attribute_float3(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc)
-{
- if (primitive_is_volume_attribute(sd, desc)) {
- return volume_attribute_value_to_float3(volume_attribute_float4(kg, sd, desc));
- }
- else {
- return make_float3(0.0f, 0.0f, 0.0f);
- }
-}
-
-ccl_device_inline float4 primitive_volume_attribute_float4(KernelGlobals kg,
- ccl_private const ShaderData *sd,
- const AttributeDescriptor desc)
-{
- if (primitive_is_volume_attribute(sd, desc)) {
- return volume_attribute_float4(kg, sd, desc);
- }
- else {
- return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
- }
-}
-#endif
-
-/* Default UV coordinate */
-
-ccl_device_inline float3 primitive_uv(KernelGlobals kg, ccl_private const ShaderData *sd)
-{
- const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_UV);
-
- if (desc.offset == ATTR_STD_NOT_FOUND)
- return make_float3(0.0f, 0.0f, 0.0f);
-
- float2 uv = primitive_surface_attribute_float2(kg, sd, desc, NULL, NULL);
- return make_float3(uv.x, uv.y, 1.0f);
-}
-
-/* Ptex coordinates */
-
-ccl_device bool primitive_ptex(KernelGlobals kg,
- ccl_private ShaderData *sd,
- ccl_private float2 *uv,
- ccl_private int *face_id)
-{
- /* storing ptex data as attributes is not memory efficient but simple for tests */
- const AttributeDescriptor desc_face_id = find_attribute(kg, sd, ATTR_STD_PTEX_FACE_ID);
- const AttributeDescriptor desc_uv = find_attribute(kg, sd, ATTR_STD_PTEX_UV);
-
- if (desc_face_id.offset == ATTR_STD_NOT_FOUND || desc_uv.offset == ATTR_STD_NOT_FOUND)
- return false;
-
- float3 uv3 = primitive_surface_attribute_float3(kg, sd, desc_uv, NULL, NULL);
- float face_id_f = primitive_surface_attribute_float(kg, sd, desc_face_id, NULL, NULL);
-
- *uv = make_float2(uv3.x, uv3.y);
- *face_id = (int)face_id_f;
-
- return true;
-}
-
-/* Surface tangent */
-
-ccl_device float3 primitive_tangent(KernelGlobals kg, ccl_private ShaderData *sd)
-{
-#ifdef __HAIR__
- if (sd->type & PRIMITIVE_ALL_CURVE)
-# ifdef __DPDU__
- return normalize(sd->dPdu);
-# else
- return make_float3(0.0f, 0.0f, 0.0f);
-# endif
-#endif
-
- /* try to create spherical tangent from generated coordinates */
- const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_GENERATED);
-
- if (desc.offset != ATTR_STD_NOT_FOUND) {
- float3 data = primitive_surface_attribute_float3(kg, sd, desc, NULL, NULL);
- data = make_float3(-(data.y - 0.5f), (data.x - 0.5f), 0.0f);
- object_normal_transform(kg, sd, &data);
- return cross(sd->N, normalize(cross(data, sd->N)));
- }
- else {
- /* otherwise use surface derivatives */
-#ifdef __DPDU__
- return normalize(sd->dPdu);
-#else
- return make_float3(0.0f, 0.0f, 0.0f);
-#endif
- }
-}
-
-/* Motion vector for motion pass */
-
-ccl_device_inline float4 primitive_motion_vector(KernelGlobals kg,
- ccl_private const ShaderData *sd)
-{
- /* center position */
- float3 center;
-
-#ifdef __HAIR__
- bool is_curve_primitive = sd->type & PRIMITIVE_ALL_CURVE;
- if (is_curve_primitive) {
- center = curve_motion_center_location(kg, sd);
-
- if (!(sd->object_flag & SD_OBJECT_TRANSFORM_APPLIED)) {
- object_position_transform(kg, sd, &center);
- }
- }
- else
-#endif
- center = sd->P;
-
- float3 motion_pre = center, motion_post = center;
-
- /* deformation motion */
- AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_MOTION_VERTEX_POSITION);
-
- if (desc.offset != ATTR_STD_NOT_FOUND) {
- /* get motion info */
- int numverts, numkeys;
- object_motion_info(kg, sd->object, NULL, &numverts, &numkeys);
-
- /* lookup attributes */
- motion_pre = primitive_surface_attribute_float3(kg, sd, desc, NULL, NULL);
-
- desc.offset += (sd->type & PRIMITIVE_ALL_TRIANGLE) ? numverts : numkeys;
- motion_post = primitive_surface_attribute_float3(kg, sd, desc, NULL, NULL);
-
-#ifdef __HAIR__
- if (is_curve_primitive && (sd->object_flag & SD_OBJECT_HAS_VERTEX_MOTION) == 0) {
- object_position_transform(kg, sd, &motion_pre);
- object_position_transform(kg, sd, &motion_post);
- }
-#endif
- }
-
- /* object motion. note that depending on the mesh having motion vectors, this
- * transformation was set match the world/object space of motion_pre/post */
- Transform tfm;
-
- tfm = object_fetch_motion_pass_transform(kg, sd->object, OBJECT_PASS_MOTION_PRE);
- motion_pre = transform_point(&tfm, motion_pre);
-
- tfm = object_fetch_motion_pass_transform(kg, sd->object, OBJECT_PASS_MOTION_POST);
- motion_post = transform_point(&tfm, motion_post);
-
- float3 motion_center;
-
- /* camera motion, for perspective/orthographic motion.pre/post will be a
- * world-to-raster matrix, for panorama it's world-to-camera */
- if (kernel_data.cam.type != CAMERA_PANORAMA) {
- ProjectionTransform projection = kernel_data.cam.worldtoraster;
- motion_center = transform_perspective(&projection, center);
-
- projection = kernel_data.cam.perspective_pre;
- motion_pre = transform_perspective(&projection, motion_pre);
-
- projection = kernel_data.cam.perspective_post;
- motion_post = transform_perspective(&projection, motion_post);
- }
- else {
- tfm = kernel_data.cam.worldtocamera;
- motion_center = normalize(transform_point(&tfm, center));
- motion_center = float2_to_float3(direction_to_panorama(&kernel_data.cam, motion_center));
- motion_center.x *= kernel_data.cam.width;
- motion_center.y *= kernel_data.cam.height;
-
- tfm = kernel_data.cam.motion_pass_pre;
- motion_pre = normalize(transform_point(&tfm, motion_pre));
- motion_pre = float2_to_float3(direction_to_panorama(&kernel_data.cam, motion_pre));
- motion_pre.x *= kernel_data.cam.width;
- motion_pre.y *= kernel_data.cam.height;
-
- tfm = kernel_data.cam.motion_pass_post;
- motion_post = normalize(transform_point(&tfm, motion_post));
- motion_post = float2_to_float3(direction_to_panorama(&kernel_data.cam, motion_post));
- motion_post.x *= kernel_data.cam.width;
- motion_post.y *= kernel_data.cam.height;
- }
-
- motion_pre = motion_pre - motion_center;
- motion_post = motion_center - motion_post;
-
- return make_float4(motion_pre.x, motion_pre.y, motion_post.x, motion_post.y);
-}
-
-CCL_NAMESPACE_END
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