Cycles render engine, initial commit. This is the engine itself, blender modifications and build instructions will follow later.

Cycles uses code from some great open source projects, many thanks them:

* BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs":
http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/
* Open Shading Language for a large part of the shading system:
http://code.google.com/p/openshadinglanguage/
* Blender for procedural textures and a few other nodes.
* Approximate Catmull Clark subdivision from NVidia Mesh tools:
http://code.google.com/p/nvidia-mesh-tools/
* Sobol direction vectors from:
http://web.maths.unsw.edu.au/~fkuo/sobol/
* Film response functions from:
http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php

1 files changed, 228 insertions, 0 deletions

diff --git a/intern/cycles/kernel/svm/svm_bsdf.h b/intern/cycles/kernel/svm/svm_bsdf.h
new file mode 100644
index 00000000000..f02dc786c6b
--- /dev/null
+++ b/intern/cycles/kernel/svm/svm_bsdf.h
@@ -0,0 +1,228 @@
+/*
+ * 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 "bsdf_ashikhmin_velvet.h"
+#include "bsdf_diffuse.h"
+#include "bsdf_microfacet.h"
+#include "bsdf_reflection.h"
+#include "bsdf_refraction.h"
+#include "bsdf_transparent.h"
+#ifdef __DPDU__
+#include "bsdf_ward.h"
+#endif
+#include "bsdf_westin.h"
+
+CCL_NAMESPACE_BEGIN
+
+__device int svm_bsdf_sample(const ShaderData *sd, float randu, float randv, float3 *eval, float3 *omega_in, differential3 *domega_in, float *pdf)
+{
+	int label;
+
+	switch(sd->svm_closure) {
+		case CLOSURE_BSDF_DIFFUSE_ID:
+			label = bsdf_diffuse_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_TRANSLUCENT_ID:
+			label = bsdf_translucent_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_REFLECTION_ID:
+			label = bsdf_reflection_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_REFRACTION_ID:
+			label = bsdf_refraction_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_TRANSPARENT_ID:
+			label = bsdf_transparent_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_MICROFACET_GGX_ID:
+		case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
+			label = bsdf_microfacet_ggx_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
+		case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
+			label = bsdf_microfacet_beckmann_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+#ifdef __DPDU__
+		case CLOSURE_BSDF_WARD_ID:
+			label = bsdf_ward_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+#endif
+		case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
+			label = bsdf_ashikhmin_velvet_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_WESTIN_BACKSCATTER_ID:
+			label = bsdf_westin_backscatter_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		case CLOSURE_BSDF_WESTIN_SHEEN_ID:
+			label = bsdf_westin_sheen_sample(sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
+			break;
+		default:
+			label = LABEL_NONE;
+			break;
+	}
+
+	*eval *= sd->svm_closure_weight;
+
+	return label;
+}
+
+__device float3 svm_bsdf_eval(const ShaderData *sd, const float3 omega_in, float *pdf)
+{
+	float3 eval;
+
+	if(dot(sd->Ng, omega_in) >= 0.0f) {
+		switch(sd->svm_closure) {
+			case CLOSURE_BSDF_DIFFUSE_ID:
+				eval = bsdf_diffuse_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_TRANSLUCENT_ID:
+				eval = bsdf_translucent_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_REFLECTION_ID:
+				eval = bsdf_reflection_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_REFRACTION_ID:
+				eval = bsdf_refraction_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_TRANSPARENT_ID:
+				eval = bsdf_transparent_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_MICROFACET_GGX_ID:
+			case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
+				eval = bsdf_microfacet_ggx_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
+			case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
+				eval = bsdf_microfacet_beckmann_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+#ifdef __DPDU__
+			case CLOSURE_BSDF_WARD_ID:
+				eval = bsdf_ward_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+#endif
+			case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
+				eval = bsdf_ashikhmin_velvet_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_WESTIN_BACKSCATTER_ID:
+				eval = bsdf_westin_backscatter_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_WESTIN_SHEEN_ID:
+				eval = bsdf_westin_sheen_eval_reflect(sd, sd->I, omega_in, pdf);
+				break;
+			default:
+				eval = make_float3(0.0f, 0.0f, 0.0f);
+				break;
+		}
+	}
+	else {
+		switch(sd->svm_closure) {
+			case CLOSURE_BSDF_DIFFUSE_ID:
+				eval = bsdf_diffuse_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_TRANSLUCENT_ID:
+				eval = bsdf_translucent_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_REFLECTION_ID:
+				eval = bsdf_reflection_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_REFRACTION_ID:
+				eval = bsdf_refraction_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_TRANSPARENT_ID:
+				eval = bsdf_transparent_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_MICROFACET_GGX_ID:
+			case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
+				eval = bsdf_microfacet_ggx_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
+			case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
+				eval = bsdf_microfacet_beckmann_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+#ifdef __DPDU__
+			case CLOSURE_BSDF_WARD_ID:
+				eval = bsdf_ward_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+#endif
+			case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
+				eval = bsdf_ashikhmin_velvet_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_WESTIN_BACKSCATTER_ID:
+				eval = bsdf_westin_backscatter_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			case CLOSURE_BSDF_WESTIN_SHEEN_ID:
+				eval = bsdf_westin_sheen_eval_transmit(sd, sd->I, omega_in, pdf);
+				break;
+			default:
+				eval = make_float3(0.0f, 0.0f, 0.0f);
+				break;
+		}
+	}
+
+	eval *= sd->svm_closure_weight;
+
+	return eval;
+}
+
+__device void svm_bsdf_blur(ShaderData *sd, float roughness)
+{
+	switch(sd->svm_closure) {
+		case CLOSURE_BSDF_DIFFUSE_ID:
+			bsdf_diffuse_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_TRANSLUCENT_ID:
+			bsdf_translucent_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_REFLECTION_ID:
+			bsdf_reflection_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_REFRACTION_ID:
+			bsdf_refraction_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_TRANSPARENT_ID:
+			bsdf_transparent_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_MICROFACET_GGX_ID:
+		case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
+			bsdf_microfacet_ggx_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
+		case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
+			bsdf_microfacet_beckmann_blur(sd, roughness);
+			break;
+#ifdef __DPDU__
+		case CLOSURE_BSDF_WARD_ID:
+			bsdf_ward_blur(sd, roughness);
+			break;
+#endif
+		case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
+			bsdf_ashikhmin_velvet_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_WESTIN_BACKSCATTER_ID:
+			bsdf_westin_backscatter_blur(sd, roughness);
+			break;
+		case CLOSURE_BSDF_WESTIN_SHEEN_ID:
+			bsdf_westin_sheen_blur(sd, roughness);
+			break;
+		default:
+			break;
+	}
+}
+
+CCL_NAMESPACE_END
+