forked from bartvdbraak/blender
Cycles: Add utility function to fetch motion keys while on CPU side
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938ec3a743
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20eb1fe3c1
@ -162,6 +162,171 @@ void Mesh::Curve::bounds_grow(const int k,
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bounds.grow(upper, mr);
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}
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void Mesh::Curve::motion_keys(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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float time,
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size_t k0, size_t k1,
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float4 r_keys[2]) const
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{
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/* Figure out which steps we need to fetch and their interpolation factor. */
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const size_t max_step = num_steps - 1;
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const size_t step = min((int)(time * max_step), max_step - 1);
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const float t = time*max_step - step;
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/* Fetch vertex coordinates. */
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float4 curr_keys[2];
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float4 next_keys[2];
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keys_for_step(curve_keys,
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curve_radius,
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key_steps,
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num_steps,
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step,
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k0, k1,
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curr_keys);
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keys_for_step(curve_keys,
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curve_radius,
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key_steps,
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num_steps,
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step + 1,
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k0, k1,
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next_keys);
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/* Interpolate between steps. */
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r_keys[0] = (1.0f - t)*curr_keys[0] + t*next_keys[0];
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r_keys[1] = (1.0f - t)*curr_keys[1] + t*next_keys[1];
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}
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void Mesh::Curve::cardinal_motion_keys(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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float time,
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size_t k0, size_t k1,
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size_t k2, size_t k3,
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float4 r_keys[4]) const
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{
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/* Figure out which steps we need to fetch and their interpolation factor. */
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const size_t max_step = num_steps - 1;
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const size_t step = min((int)(time * max_step), max_step - 1);
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const float t = time*max_step - step;
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/* Fetch vertex coordinates. */
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float4 curr_keys[4];
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float4 next_keys[4];
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cardinal_keys_for_step(curve_keys,
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curve_radius,
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key_steps,
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num_steps,
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step,
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k0, k1, k2, k3,
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curr_keys);
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cardinal_keys_for_step(curve_keys,
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curve_radius,
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key_steps,
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num_steps,
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step + 1,
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k0, k1, k2, k3,
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next_keys);
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/* Interpolate between steps. */
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r_keys[0] = (1.0f - t)*curr_keys[0] + t*next_keys[0];
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r_keys[1] = (1.0f - t)*curr_keys[1] + t*next_keys[1];
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r_keys[2] = (1.0f - t)*curr_keys[2] + t*next_keys[2];
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r_keys[3] = (1.0f - t)*curr_keys[3] + t*next_keys[3];
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}
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void Mesh::Curve::keys_for_step(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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size_t step,
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size_t k0, size_t k1,
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float4 r_keys[2]) const
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{
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const size_t center_step = ((num_steps - 1) / 2);
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if(step == center_step) {
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/* Center step: regular key location. */
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/* TODO(sergey): Consider adding make_float4(float3, float)
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* function.
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*/
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r_keys[0] = make_float4(curve_keys[first_key + k0].x,
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curve_keys[first_key + k0].y,
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curve_keys[first_key + k0].z,
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curve_radius[k0]);
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r_keys[1] = make_float4(curve_keys[first_key + k1].x,
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curve_keys[first_key + k1].y,
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curve_keys[first_key + k1].z,
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curve_radius[k1]);
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}
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else {
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/* Center step is not stored in this array. */
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if(step > center_step) {
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step--;
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}
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const size_t offset = first_key + step * num_keys;
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r_keys[0] = make_float4(key_steps[offset + k0].x,
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key_steps[offset + k0].y,
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key_steps[offset + k0].z,
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curve_radius[k0]);
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r_keys[1] = make_float4(key_steps[offset + k1].x,
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key_steps[offset + k1].y,
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key_steps[offset + k1].z,
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curve_radius[k1]);
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}
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}
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void Mesh::Curve::cardinal_keys_for_step(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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size_t step,
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size_t k0, size_t k1,
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size_t k2, size_t k3,
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float4 r_keys[4]) const
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{
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const size_t center_step = ((num_steps - 1) / 2);
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if(step == center_step) {
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/* Center step: regular key location. */
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r_keys[0] = make_float4(curve_keys[first_key + k0].x,
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curve_keys[first_key + k0].y,
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curve_keys[first_key + k0].z,
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curve_radius[k0]);
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r_keys[1] = make_float4(curve_keys[first_key + k1].x,
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curve_keys[first_key + k1].y,
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curve_keys[first_key + k1].z,
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curve_radius[k1]);
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r_keys[2] = make_float4(curve_keys[first_key + k2].x,
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curve_keys[first_key + k2].y,
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curve_keys[first_key + k2].z,
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curve_radius[k2]);
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r_keys[3] = make_float4(curve_keys[first_key + k3].x,
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curve_keys[first_key + k3].y,
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curve_keys[first_key + k3].z,
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curve_radius[k3]);
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}
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else {
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/* Center step is not stored in this array. */
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if(step > center_step) {
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step--;
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}
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const size_t offset = first_key + step * num_keys;
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r_keys[0] = make_float4(key_steps[offset + k0].x,
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key_steps[offset + k0].y,
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key_steps[offset + k0].z,
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curve_radius[k0]);
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r_keys[1] = make_float4(key_steps[offset + k1].x,
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key_steps[offset + k1].y,
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key_steps[offset + k1].z,
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curve_radius[k1]);
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r_keys[2] = make_float4(key_steps[offset + k2].x,
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key_steps[offset + k2].y,
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key_steps[offset + k2].z,
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curve_radius[k2]);
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r_keys[3] = make_float4(key_steps[offset + k3].x,
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key_steps[offset + k3].y,
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key_steps[offset + k3].z,
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curve_radius[k3]);
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}
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}
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/* SubdFace */
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float3 Mesh::SubdFace::normal(const Mesh *mesh) const
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@ -100,6 +100,38 @@ public:
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const float *curve_radius,
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const Transform& aligned_space,
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BoundBox& bounds) const;
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void motion_keys(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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float time,
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size_t k0, size_t k1,
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float4 r_keys[2]) const;
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void cardinal_motion_keys(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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float time,
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size_t k0, size_t k1,
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size_t k2, size_t k3,
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float4 r_keys[4]) const;
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void keys_for_step(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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size_t step,
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size_t k0, size_t k1,
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float4 r_keys[2]) const;
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void cardinal_keys_for_step(const float3 *curve_keys,
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const float *curve_radius,
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const float3 *key_steps,
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size_t num_steps,
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size_t step,
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size_t k0, size_t k1,
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size_t k2, size_t k3,
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float4 r_keys[4]) const;
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};
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Curve get_curve(size_t i) const
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