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/*
* Copyright 2012, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
CCL_NAMESPACE_BEGIN
/* Brick */
__device_noinline float brick_noise(int n) /* fast integer noise */
{
int nn;
n = (n >> 13) ^ n;
nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff;
return 0.5f * ((float)nn / 1073741824.0f);
}
__device_noinline float2 svm_brick(float3 p, float scale, float mortar_size, float bias,
float brick_width, float row_height, float offset_amount, int offset_frequency,
float squash_amount, int squash_frequency)
{
p *= scale;
int bricknum, rownum;
float offset = 0.0f;
float x, y;
rownum = floor_to_int(p.y / row_height);
if(offset_frequency && squash_frequency) {
brick_width *= (rownum % squash_frequency) ? 1.0f : squash_amount; /* squash */
offset = (rownum % offset_frequency) ? 0.0f : (brick_width*offset_amount); /* offset */
}
bricknum = floor_to_int((p.x+offset) / brick_width);
x = (p.x+offset) - brick_width*bricknum;
y = p.y - row_height*rownum;
return make_float2(
clamp((brick_noise((rownum << 16) + (bricknum & 0xFFFF)) + bias), 0.0f, 1.0f),
(x < mortar_size || y < mortar_size ||
x > (brick_width - mortar_size) ||
y > (row_height - mortar_size)) ? 1.0f : 0.0f);
}
__device void svm_node_tex_brick(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
{
uint4 node2 = read_node(kg, offset);
uint4 node3 = read_node(kg, offset);
/* Input and Output Sockets */
uint co_offset, color1_offset, color2_offset, mortar_offset, scale_offset;
uint mortar_size_offset, bias_offset, brick_width_offset, row_height_offset;
uint color_offset, fac_offset;
/* RNA properties */
uint offset_frequency, squash_frequency;
decode_node_uchar4(node.y, &co_offset, &color1_offset, &color2_offset, &mortar_offset);
decode_node_uchar4(node.z, &scale_offset, &mortar_size_offset, &bias_offset, &brick_width_offset);
decode_node_uchar4(node.w, &row_height_offset, &color_offset, &fac_offset, NULL);
decode_node_uchar4(node2.x, &offset_frequency, &squash_frequency, NULL, NULL);
float3 co = stack_load_float3(stack, co_offset);
float3 color1 = stack_load_float3(stack, color1_offset);
float3 color2 = stack_load_float3(stack, color2_offset);
float3 mortar = stack_load_float3(stack, mortar_offset);
float scale = stack_load_float_default(stack, scale_offset, node2.y);
float mortar_size = stack_load_float_default(stack, mortar_size_offset, node2.z);
float bias = stack_load_float_default(stack, bias_offset, node2.w);
float brick_width = stack_load_float_default(stack, brick_width_offset, node3.x);
float row_height = stack_load_float_default(stack, row_height_offset, node3.y);
float offset_amount = __int_as_float(node3.z);
float squash_amount = __int_as_float(node3.w);
float2 f2 = svm_brick(co, scale, mortar_size, bias, brick_width, row_height,
offset_amount, offset_frequency, squash_amount, squash_frequency);
float tint = f2.x;
float f = f2.y;
if(f != 1.0f) {
float facm = 1.0f - tint;
color1.x = facm * (color1.x) + tint * color2.x;
color1.y = facm * (color1.y) + tint * color2.y;
color1.z = facm * (color1.z) + tint * color2.z;
}
if(stack_valid(color_offset))
stack_store_float3(stack, color_offset, (f == 1.0f)? mortar: color1);
if(stack_valid(fac_offset))
stack_store_float(stack, fac_offset, f);
}
CCL_NAMESPACE_END
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