GPU: Split gpu_shader_material into multiple files.

This patch continue the efforts to split the `gpu_shader_material` file
started in D5569.

Dependency resolution is now recursive. Each shading node gets its own
file. Additionally, some utility files are added to be shared between
files, like `math_util`, `color_util`, and `hash`. Some files are always
included because they may be used in the execution function, like
`world_normals`.

Some glsl functions appeared to be unused, so they were removed, like
`output_node`, `bits_to_01`, and `exp_blender`. Other functions have
been renamed to be more general and get used as utils, like `texco_norm`
which became `vector_normalize`.

A lot of the opengl tests fails, but those same tests also fail in
master, so this is probably unrelated to this patch.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D5616

1 files changed, 19 insertions, 0 deletions

diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_tex_noise.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_tex_noise.glsl
new file mode 100644
index 00000000000..30e27da16e8
--- /dev/null
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_tex_noise.glsl
@@ -0,0 +1,19 @@
+void node_tex_noise(
+    vec3 co, float scale, float detail, float distortion, out vec4 color, out float fac)
+{
+  vec3 p = co * scale;
+  int hard = 0;
+  if (distortion != 0.0) {
+    vec3 r, offset = vec3(13.5, 13.5, 13.5);
+    r.x = noise(p + offset) * distortion;
+    r.y = noise(p) * distortion;
+    r.z = noise(p - offset) * distortion;
+    p += r;
+  }
+
+  fac = noise_turbulence(p, detail, hard);
+  color = vec4(fac,
+               noise_turbulence(vec3(p.y, p.x, p.z), detail, hard),
+               noise_turbulence(vec3(p.y, p.z, p.x), detail, hard),
+               1);
+}