forked from bartvdbraak/blender
139 lines
4.8 KiB
C
139 lines
4.8 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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CCL_NAMESPACE_BEGIN
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/* Brick */
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ccl_device_inline float brick_noise(uint n) /* fast integer noise */
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{
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uint nn;
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n = (n + 1013) & 0x7fffffff;
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n = (n >> 13) ^ n;
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nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff;
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return 0.5f * ((float)nn / 1073741824.0f);
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}
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ccl_device_noinline_cpu float2 svm_brick(float3 p,
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float mortar_size,
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float mortar_smooth,
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float bias,
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float brick_width,
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float row_height,
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float offset_amount,
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int offset_frequency,
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float squash_amount,
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int squash_frequency)
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{
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int bricknum, rownum;
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float offset = 0.0f;
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float x, y;
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rownum = floor_to_int(p.y / row_height);
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if (offset_frequency && squash_frequency) {
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brick_width *= (rownum % squash_frequency) ? 1.0f : squash_amount; /* squash */
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offset = (rownum % offset_frequency) ? 0.0f : (brick_width * offset_amount); /* offset */
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}
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bricknum = floor_to_int((p.x + offset) / brick_width);
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x = (p.x + offset) - brick_width * bricknum;
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y = p.y - row_height * rownum;
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float tint = saturate((brick_noise((rownum << 16) + (bricknum & 0xFFFF)) + bias));
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float min_dist = min(min(x, y), min(brick_width - x, row_height - y));
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float mortar;
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if (min_dist >= mortar_size) {
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mortar = 0.0f;
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}
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else if (mortar_smooth == 0.0f) {
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mortar = 1.0f;
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}
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else {
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min_dist = 1.0f - min_dist / mortar_size;
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mortar = (min_dist < mortar_smooth) ? smoothstepf(min_dist / mortar_smooth) : 1.0f;
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}
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return make_float2(tint, mortar);
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}
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ccl_device void svm_node_tex_brick(
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KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
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{
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uint4 node2 = read_node(kg, offset);
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uint4 node3 = read_node(kg, offset);
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uint4 node4 = read_node(kg, offset);
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/* Input and Output Sockets */
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uint co_offset, color1_offset, color2_offset, mortar_offset, scale_offset;
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uint mortar_size_offset, bias_offset, brick_width_offset, row_height_offset;
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uint color_offset, fac_offset, mortar_smooth_offset;
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/* RNA properties */
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uint offset_frequency, squash_frequency;
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svm_unpack_node_uchar4(node.y, &co_offset, &color1_offset, &color2_offset, &mortar_offset);
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svm_unpack_node_uchar4(
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node.z, &scale_offset, &mortar_size_offset, &bias_offset, &brick_width_offset);
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svm_unpack_node_uchar4(
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node.w, &row_height_offset, &color_offset, &fac_offset, &mortar_smooth_offset);
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svm_unpack_node_uchar2(node2.x, &offset_frequency, &squash_frequency);
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float3 co = stack_load_float3(stack, co_offset);
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float3 color1 = stack_load_float3(stack, color1_offset);
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float3 color2 = stack_load_float3(stack, color2_offset);
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float3 mortar = stack_load_float3(stack, mortar_offset);
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float scale = stack_load_float_default(stack, scale_offset, node2.y);
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float mortar_size = stack_load_float_default(stack, mortar_size_offset, node2.z);
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float mortar_smooth = stack_load_float_default(stack, mortar_smooth_offset, node4.x);
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float bias = stack_load_float_default(stack, bias_offset, node2.w);
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float brick_width = stack_load_float_default(stack, brick_width_offset, node3.x);
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float row_height = stack_load_float_default(stack, row_height_offset, node3.y);
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float offset_amount = __int_as_float(node3.z);
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float squash_amount = __int_as_float(node3.w);
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float2 f2 = svm_brick(co * scale,
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mortar_size,
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mortar_smooth,
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bias,
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brick_width,
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row_height,
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offset_amount,
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offset_frequency,
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squash_amount,
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squash_frequency);
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float tint = f2.x;
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float f = f2.y;
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if (f != 1.0f) {
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float facm = 1.0f - tint;
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color1 = facm * color1 + tint * color2;
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}
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if (stack_valid(color_offset))
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stack_store_float3(stack, color_offset, color1 * (1.0f - f) + mortar * f);
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if (stack_valid(fac_offset))
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stack_store_float(stack, fac_offset, f);
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}
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CCL_NAMESPACE_END
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