diff options
author | Julian Eisel <julian@blender.org> | 2020-07-01 18:25:04 +0300 |
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committer | Julian Eisel <julian@blender.org> | 2020-07-01 18:25:04 +0300 |
commit | 889c4ca9c26d770af02cedef972d65eb173bdb5e (patch) | |
tree | 6f46156146db1b3f09d92c6eaa1f44ba8a584ed4 /intern/cycles/kernel/geom/geom_curve.h | |
parent | 87df15190210eb84ef52e5dccc2932918f912da5 (diff) | |
parent | 0829cebeb024095c268f190c34daa8ae9a5a224c (diff) |
Merge branch 'asset-uuid--archived' into asset-engine--archivedasset-engine--archived
Diffstat (limited to 'intern/cycles/kernel/geom/geom_curve.h')
-rw-r--r-- | intern/cycles/kernel/geom/geom_curve.h | 91 |
1 files changed, 62 insertions, 29 deletions
diff --git a/intern/cycles/kernel/geom/geom_curve.h b/intern/cycles/kernel/geom/geom_curve.h index 928cad58452..6ff0c7f2044 100644 --- a/intern/cycles/kernel/geom/geom_curve.h +++ b/intern/cycles/kernel/geom/geom_curve.h @@ -23,33 +23,6 @@ CCL_NAMESPACE_BEGIN #ifdef __HAIR__ -/* Interpolation of curve geometry */ - -ccl_device_inline float3 curvetangent(float t, float3 p0, float3 p1, float3 p2, float3 p3) -{ - float fc = 0.71f; - float data[4]; - float t2 = t * t; - data[0] = -3.0f * fc * t2 + 4.0f * fc * t - fc; - data[1] = 3.0f * (2.0f - fc) * t2 + 2.0f * (fc - 3.0f) * t; - data[2] = 3.0f * (fc - 2.0f) * t2 + 2.0f * (3.0f - 2.0f * fc) * t + fc; - data[3] = 3.0f * fc * t2 - 2.0f * fc * t; - return data[0] * p0 + data[1] * p1 + data[2] * p2 + data[3] * p3; -} - -ccl_device_inline float3 curvepoint(float t, float3 p0, float3 p1, float3 p2, float3 p3) -{ - float data[4]; - float fc = 0.71f; - float t2 = t * t; - float t3 = t2 * t; - data[0] = -fc * t3 + 2.0f * fc * t2 - fc * t; - data[1] = (2.0f - fc) * t3 + (fc - 3.0f) * t2 + 1.0f; - data[2] = (fc - 2.0f) * t3 + (3.0f - 2.0f * fc) * t2 + fc * t; - data[3] = fc * t3 - fc * t2; - return data[0] * p0 + data[1] * p1 + data[2] * p2 + data[3] * p3; -} - /* Reading attributes on various curve elements */ ccl_device float curve_attribute_float( @@ -225,6 +198,66 @@ ccl_device float3 curve_attribute_float3(KernelGlobals *kg, } } +ccl_device float4 curve_attribute_float4(KernelGlobals *kg, + const ShaderData *sd, + const AttributeDescriptor desc, + float4 *dx, + float4 *dy) +{ + if (desc.element == ATTR_ELEMENT_CURVE) { + /* idea: we can't derive any useful differentials here, but for tiled + * mipmap image caching it would be useful to avoid reading the highest + * detail level always. maybe a derivative based on the hair density + * could be computed somehow? */ +# ifdef __RAY_DIFFERENTIALS__ + 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); +# endif + + return kernel_tex_fetch(__attributes_float3, desc.offset + sd->prim); + } + else if (desc.element == ATTR_ELEMENT_CURVE_KEY || + desc.element == ATTR_ELEMENT_CURVE_KEY_MOTION) { + float4 curvedata = kernel_tex_fetch(__curves, sd->prim); + int k0 = __float_as_int(curvedata.x) + PRIMITIVE_UNPACK_SEGMENT(sd->type); + int k1 = k0 + 1; + + float4 f0 = kernel_tex_fetch(__attributes_float3, desc.offset + k0); + float4 f1 = kernel_tex_fetch(__attributes_float3, desc.offset + k1); + +# ifdef __RAY_DIFFERENTIALS__ + if (dx) + *dx = sd->du.dx * (f1 - f0); + if (dy) + *dy = make_float4(0.0f, 0.0f, 0.0f, 0.0f); +# endif + + return (1.0f - sd->u) * f0 + sd->u * f1; + } + else if (desc.element == ATTR_ELEMENT_OBJECT || desc.element == ATTR_ELEMENT_MESH) { +# ifdef __RAY_DIFFERENTIALS__ + 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); +# endif + + return kernel_tex_fetch(__attributes_float3, desc.offset); + } + else { +# ifdef __RAY_DIFFERENTIALS__ + 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); +# endif + + return make_float4(0.0f, 0.0f, 0.0f, 0.0f); + } +} + /* Curve thickness */ ccl_device float curve_thickness(KernelGlobals *kg, ShaderData *sd) @@ -238,12 +271,12 @@ ccl_device float curve_thickness(KernelGlobals *kg, ShaderData *sd) float4 P_curve[2]; - if (sd->type & PRIMITIVE_CURVE) { + if (!(sd->type & PRIMITIVE_ALL_MOTION)) { P_curve[0] = kernel_tex_fetch(__curve_keys, k0); P_curve[1] = kernel_tex_fetch(__curve_keys, k1); } else { - motion_curve_keys(kg, sd->object, sd->prim, sd->time, k0, k1, P_curve); + motion_curve_keys_linear(kg, sd->object, sd->prim, sd->time, k0, k1, P_curve); } r = (P_curve[1].w - P_curve[0].w) * sd->u + P_curve[0].w; |