Shading: Rewrite Mapping node with dynamic inputs.

This patch rewrites the Mapping node to support dynamic inputs. The
Max and Min options have been removed. They can be added as Min and
Max Vector Math nodes manually.

Texture nodes still use the old matrix-based mapping. A new SVM node
`NODE_TEXTURE_MAPPING` has been added to preserve this functionality.
Similarly, in GLSL, a `mapping_mat4` function has been added.

Reviewers: brecht, JacquesLucke

1 files changed, 26 insertions, 0 deletions

diff --git a/intern/cycles/util/util_transform.h b/intern/cycles/util/util_transform.h
index cfe71d696ed..407654245cb 100644
--- a/intern/cycles/util/util_transform.h
+++ b/intern/cycles/util/util_transform.h
@@ -148,6 +148,32 @@ ccl_device_inline Transform make_transform(float a,
   return t;
 }
 
+ccl_device_inline Transform euler_to_transform(const float3 euler)
+{
+  float cx = cosf(euler.x);
+  float cy = cosf(euler.y);
+  float cz = cosf(euler.z);
+  float sx = sinf(euler.x);
+  float sy = sinf(euler.y);
+  float sz = sinf(euler.z);
+
+  Transform t;
+  t.x.x = cy * cz;
+  t.y.x = cy * sz;
+  t.z.x = -sy;
+
+  t.x.y = sy * sx * cz - cx * sz;
+  t.y.y = sy * sx * sz + cx * cz;
+  t.z.y = cy * sx;
+
+  t.x.z = sy * cx * cz + sx * sz;
+  t.y.z = sy * cx * sz - sx * cz;
+  t.z.z = cy * cx;
+
+  t.x.w = t.y.w = t.z.w = 0.0f;
+  return t;
+}
+
 /* Constructs a coordinate frame from a normalized normal. */
 ccl_device_inline Transform make_transform_frame(float3 N)
 {