diff options
Diffstat (limited to 'game/addons/zylann.hterrain/tools/generator/shaders/bump2normal.gdshader')
-rw-r--r-- | game/addons/zylann.hterrain/tools/generator/shaders/bump2normal.gdshader | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/game/addons/zylann.hterrain/tools/generator/shaders/bump2normal.gdshader b/game/addons/zylann.hterrain/tools/generator/shaders/bump2normal.gdshader new file mode 100644 index 0000000..7dd9714 --- /dev/null +++ b/game/addons/zylann.hterrain/tools/generator/shaders/bump2normal.gdshader @@ -0,0 +1,27 @@ +shader_type canvas_item; +render_mode blend_disabled; + +#include "res://addons/zylann.hterrain/shaders/include/heightmap.gdshaderinc" + +//uniform sampler2D u_screen_texture : hint_screen_texture; +uniform sampler2D u_previous_pass; + +vec4 pack_normal(vec3 n) { + return vec4((0.5 * (n + 1.0)).xzy, 1.0); +} + +float get_height(sampler2D tex, vec2 uv) { + return sample_height_from_viewport(tex, uv); +} + +void fragment() { + vec2 uv = SCREEN_UV; + vec2 ps = SCREEN_PIXEL_SIZE; + float left = get_height(u_previous_pass, uv + vec2(-ps.x, 0)); + float right = get_height(u_previous_pass, uv + vec2(ps.x, 0)); + float back = get_height(u_previous_pass, uv + vec2(0, -ps.y)); + float fore = get_height(u_previous_pass, uv + vec2(0, ps.y)); + vec3 n = normalize(vec3(left - right, 2.0, fore - back)); + COLOR = pack_normal(n); +} + |