Commit: 20eb1fe3c1c7a312e0c7ca201ff7c89aa97814e0
Author: Sergey Sharybin
Date: Mon Jan 16 20:26:17 2017 +0100
Branches: master
https://developer.blender.org/rB20eb1fe3c1c7a312e0c7ca201ff7c89aa97814e0
Cycles: Add utility function to fetch motion keys while on CPU side
===================================================================
M intern/cycles/render/mesh.cpp
M intern/cycles/render/mesh.h
===================================================================
diff --git a/intern/cycles/render/mesh.cpp b/intern/cycles/render/mesh.cpp
index 496ab1ed2c..488ec271ee 100644
--- a/intern/cycles/render/mesh.cpp
+++ b/intern/cycles/render/mesh.cpp
@@ -162,6 +162,171 @@ void Mesh::Curve::bounds_grow(const int k,
bounds.grow(upper, mr);
}
+void Mesh::Curve::motion_keys(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ float time,
+ size_t k0, size_t k1,
+ float4 r_keys[2]) const
+{
+ /* Figure out which steps we need to fetch and their interpolation
factor. */
+ const size_t max_step = num_steps - 1;
+ const size_t step = min((int)(time * max_step), max_step - 1);
+ const float t = time*max_step - step;
+ /* Fetch vertex coordinates. */
+ float4 curr_keys[2];
+ float4 next_keys[2];
+ keys_for_step(curve_keys,
+ curve_radius,
+ key_steps,
+ num_steps,
+ step,
+ k0, k1,
+ curr_keys);
+ keys_for_step(curve_keys,
+ curve_radius,
+ key_steps,
+ num_steps,
+ step + 1,
+ k0, k1,
+ next_keys);
+ /* Interpolate between steps. */
+ r_keys[0] = (1.0f - t)*curr_keys[0] + t*next_keys[0];
+ r_keys[1] = (1.0f - t)*curr_keys[1] + t*next_keys[1];
+}
+
+void Mesh::Curve::cardinal_motion_keys(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ float time,
+ size_t k0, size_t k1,
+ size_t k2, size_t k3,
+ float4 r_keys[4]) const
+{
+ /* Figure out which steps we need to fetch and their interpolation
factor. */
+ const size_t max_step = num_steps - 1;
+ const size_t step = min((int)(time * max_step), max_step - 1);
+ const float t = time*max_step - step;
+ /* Fetch vertex coordinates. */
+ float4 curr_keys[4];
+ float4 next_keys[4];
+ cardinal_keys_for_step(curve_keys,
+ curve_radius,
+ key_steps,
+ num_steps,
+ step,
+ k0, k1, k2, k3,
+ curr_keys);
+ cardinal_keys_for_step(curve_keys,
+ curve_radius,
+ key_steps,
+ num_steps,
+ step + 1,
+ k0, k1, k2, k3,
+ next_keys);
+ /* Interpolate between steps. */
+ r_keys[0] = (1.0f - t)*curr_keys[0] + t*next_keys[0];
+ r_keys[1] = (1.0f - t)*curr_keys[1] + t*next_keys[1];
+ r_keys[2] = (1.0f - t)*curr_keys[2] + t*next_keys[2];
+ r_keys[3] = (1.0f - t)*curr_keys[3] + t*next_keys[3];
+}
+
+void Mesh::Curve::keys_for_step(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ size_t step,
+ size_t k0, size_t k1,
+ float4 r_keys[2]) const
+{
+ const size_t center_step = ((num_steps - 1) / 2);
+ if(step == center_step) {
+ /* Center step: regular key location. */
+ /* TODO(sergey): Consider adding make_float4(float3, float)
+ * function.
+ */
+ r_keys[0] = make_float4(curve_keys[first_key + k0].x,
+ curve_keys[first_key + k0].y,
+ curve_keys[first_key + k0].z,
+ curve_radius[k0]);
+ r_keys[1] = make_float4(curve_keys[first_key + k1].x,
+ curve_keys[first_key + k1].y,
+ curve_keys[first_key + k1].z,
+ curve_radius[k1]);
+ }
+ else {
+ /* Center step is not stored in this array. */
+ if(step > center_step) {
+ step--;
+ }
+ const size_t offset = first_key + step * num_keys;
+ r_keys[0] = make_float4(key_steps[offset + k0].x,
+ key_steps[offset + k0].y,
+ key_steps[offset + k0].z,
+ curve_radius[k0]);
+ r_keys[1] = make_float4(key_steps[offset + k1].x,
+ key_steps[offset + k1].y,
+ key_steps[offset + k1].z,
+ curve_radius[k1]);
+ }
+}
+
+void Mesh::Curve::cardinal_keys_for_step(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ size_t step,
+ size_t k0, size_t k1,
+ size_t k2, size_t k3,
+ float4 r_keys[4]) const
+{
+ const size_t center_step = ((num_steps - 1) / 2);
+ if(step == center_step) {
+ /* Center step: regular key location. */
+ r_keys[0] = make_float4(curve_keys[first_key + k0].x,
+ curve_keys[first_key + k0].y,
+ curve_keys[first_key + k0].z,
+ curve_radius[k0]);
+ r_keys[1] = make_float4(curve_keys[first_key + k1].x,
+ curve_keys[first_key + k1].y,
+ curve_keys[first_key + k1].z,
+ curve_radius[k1]);
+ r_keys[2] = make_float4(curve_keys[first_key + k2].x,
+ curve_keys[first_key + k2].y,
+ curve_keys[first_key + k2].z,
+ curve_radius[k2]);
+ r_keys[3] = make_float4(curve_keys[first_key + k3].x,
+ curve_keys[first_key + k3].y,
+ curve_keys[first_key + k3].z,
+ curve_radius[k3]);
+ }
+ else {
+ /* Center step is not stored in this array. */
+ if(step > center_step) {
+ step--;
+ }
+ const size_t offset = first_key + step * num_keys;
+ r_keys[0] = make_float4(key_steps[offset + k0].x,
+ key_steps[offset + k0].y,
+ key_steps[offset + k0].z,
+ curve_radius[k0]);
+ r_keys[1] = make_float4(key_steps[offset + k1].x,
+ key_steps[offset + k1].y,
+ key_steps[offset + k1].z,
+ curve_radius[k1]);
+ r_keys[2] = make_float4(key_steps[offset + k2].x,
+ key_steps[offset + k2].y,
+ key_steps[offset + k2].z,
+ curve_radius[k2]);
+ r_keys[3] = make_float4(key_steps[offset + k3].x,
+ key_steps[offset + k3].y,
+ key_steps[offset + k3].z,
+ curve_radius[k3]);
+ }
+}
+
/* SubdFace */
float3 Mesh::SubdFace::normal(const Mesh *mesh) const
diff --git a/intern/cycles/render/mesh.h b/intern/cycles/render/mesh.h
index 33d8acc9c8..b29a2561a0 100644
--- a/intern/cycles/render/mesh.h
+++ b/intern/cycles/render/mesh.h
@@ -100,6 +100,38 @@ public:
const float *curve_radius,
const Transform& aligned_space,
BoundBox& bounds) const;
+
+ void motion_keys(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ float time,
+ size_t k0, size_t k1,
+ float4 r_keys[2]) const;
+ void cardinal_motion_keys(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ float time,
+ size_t k0, size_t k1,
+ size_t k2, size_t k3,
+ float4 r_keys[4]) const;
+
+ void keys_for_step(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ size_t step,
+ size_t k0, size_t k1,
+ float4 r_keys[2]) const;
+ void cardinal_keys_for_step(const float3 *curve_keys,
+ const float *curve_radius,
+ const float3 *key_steps,
+ size_t num_steps,
+ size_t step,
+ size_t k0, size_t k1,
+ size_t k2, size_t k3,
+ float4 r_keys[4]) const;
};
Curve get_curve(size_t i) const
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