diff options
Diffstat (limited to 'scene/resources/visual_shader_sdf_nodes.cpp')
| -rw-r--r-- | scene/resources/visual_shader_sdf_nodes.cpp | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/scene/resources/visual_shader_sdf_nodes.cpp b/scene/resources/visual_shader_sdf_nodes.cpp new file mode 100644 index 0000000000..14c655b129 --- /dev/null +++ b/scene/resources/visual_shader_sdf_nodes.cpp @@ -0,0 +1,283 @@ +/*************************************************************************/ +/* visual_shader_sdf_nodes.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#include "visual_shader_sdf_nodes.h" + +// VisualShaderNodeSDFToScreenUV + +String VisualShaderNodeSDFToScreenUV::get_caption() const { + return "SDFToScreenUV"; +} + +int VisualShaderNodeSDFToScreenUV::get_input_port_count() const { + return 1; +} + +VisualShaderNodeSDFToScreenUV::PortType VisualShaderNodeSDFToScreenUV::get_input_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeSDFToScreenUV::get_input_port_name(int p_port) const { + return "sdf_pos"; +} + +int VisualShaderNodeSDFToScreenUV::get_output_port_count() const { + return 1; +} + +VisualShaderNodeSDFToScreenUV::PortType VisualShaderNodeSDFToScreenUV::get_output_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeSDFToScreenUV::get_output_port_name(int p_port) const { + return ""; +} + +String VisualShaderNodeSDFToScreenUV::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const { + return " " + p_output_vars[0] + " = vec3(sdf_to_screen_uv(" + (p_input_vars[0] == String() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + "), 0.0f);\n"; +} + +VisualShaderNodeSDFToScreenUV::VisualShaderNodeSDFToScreenUV() { +} + +// VisualShaderNodeScreenUVToSDF + +String VisualShaderNodeScreenUVToSDF::get_caption() const { + return "ScreenUVToSDF"; +} + +int VisualShaderNodeScreenUVToSDF::get_input_port_count() const { + return 1; +} + +VisualShaderNodeScreenUVToSDF::PortType VisualShaderNodeScreenUVToSDF::get_input_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeScreenUVToSDF::get_input_port_name(int p_port) const { + return "uv"; +} + +int VisualShaderNodeScreenUVToSDF::get_output_port_count() const { + return 1; +} + +VisualShaderNodeScreenUVToSDF::PortType VisualShaderNodeScreenUVToSDF::get_output_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeScreenUVToSDF::get_output_port_name(int p_port) const { + return ""; +} + +String VisualShaderNodeScreenUVToSDF::get_input_port_default_hint(int p_port) const { + if (p_port == 0) { + return "default"; + } + return ""; +} + +String VisualShaderNodeScreenUVToSDF::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const { + return " " + p_output_vars[0] + " = vec3(screen_uv_to_sdf(" + (p_input_vars[0] == String() ? "SCREEN_UV" : p_input_vars[0] + ".xy") + "), 0.0f);\n"; +} + +VisualShaderNodeScreenUVToSDF::VisualShaderNodeScreenUVToSDF() { +} + +// VisualShaderNodeTextureSDF + +String VisualShaderNodeTextureSDF::get_caption() const { + return "TextureSDF"; +} + +int VisualShaderNodeTextureSDF::get_input_port_count() const { + return 1; +} + +VisualShaderNodeTextureSDF::PortType VisualShaderNodeTextureSDF::get_input_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeTextureSDF::get_input_port_name(int p_port) const { + return "sdf_pos"; +} + +int VisualShaderNodeTextureSDF::get_output_port_count() const { + return 1; +} + +VisualShaderNodeTextureSDF::PortType VisualShaderNodeTextureSDF::get_output_port_type(int p_port) const { + return PORT_TYPE_SCALAR; +} + +String VisualShaderNodeTextureSDF::get_output_port_name(int p_port) const { + return ""; +} + +String VisualShaderNodeTextureSDF::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const { + return " " + p_output_vars[0] + " = texture_sdf(" + (p_input_vars[0] == String() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + ");\n"; +} + +VisualShaderNodeTextureSDF::VisualShaderNodeTextureSDF() { +} + +// VisualShaderNodeTextureSDFNormal + +String VisualShaderNodeTextureSDFNormal::get_caption() const { + return "TextureSDFNormal"; +} + +int VisualShaderNodeTextureSDFNormal::get_input_port_count() const { + return 1; +} + +VisualShaderNodeTextureSDFNormal::PortType VisualShaderNodeTextureSDFNormal::get_input_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeTextureSDFNormal::get_input_port_name(int p_port) const { + return "sdf_pos"; +} + +int VisualShaderNodeTextureSDFNormal::get_output_port_count() const { + return 1; +} + +VisualShaderNodeTextureSDFNormal::PortType VisualShaderNodeTextureSDFNormal::get_output_port_type(int p_port) const { + return PORT_TYPE_VECTOR; +} + +String VisualShaderNodeTextureSDFNormal::get_output_port_name(int p_port) const { + return ""; +} + +String VisualShaderNodeTextureSDFNormal::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const { + return " " + p_output_vars[0] + " = vec3(texture_sdf_normal(" + (p_input_vars[0] == String() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + "), 0.0f);\n"; +} + +VisualShaderNodeTextureSDFNormal::VisualShaderNodeTextureSDFNormal() { +} + +// VisualShaderNodeSDFRaymarch + +String VisualShaderNodeSDFRaymarch::get_caption() const { + return "SDFRaymarch"; +} + +int VisualShaderNodeSDFRaymarch::get_input_port_count() const { + return 2; +} + +VisualShaderNodeSDFRaymarch::PortType VisualShaderNodeSDFRaymarch::get_input_port_type(int p_port) const { + if (p_port == 0 || p_port == 1) { + return PORT_TYPE_VECTOR; + } + return PORT_TYPE_SCALAR; +} + +String VisualShaderNodeSDFRaymarch::get_input_port_name(int p_port) const { + if (p_port == 0) { + return "from_pos"; + } else if (p_port == 1) { + return "to_pos"; + } + return String(); +} + +int VisualShaderNodeSDFRaymarch::get_output_port_count() const { + return 3; +} + +VisualShaderNodeSDFRaymarch::PortType VisualShaderNodeSDFRaymarch::get_output_port_type(int p_port) const { + if (p_port == 0) { + return PORT_TYPE_SCALAR; + } else if (p_port == 1) { + return PORT_TYPE_BOOLEAN; + } else if (p_port == 2) { + return PORT_TYPE_VECTOR; + } + return PORT_TYPE_SCALAR; +} + +String VisualShaderNodeSDFRaymarch::get_output_port_name(int p_port) const { + if (p_port == 0) { + return "distance"; + } else if (p_port == 1) { + return "hit"; + } else if (p_port == 2) { + return "end_pos"; + } + return String(); +} + +String VisualShaderNodeSDFRaymarch::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const { + String code; + + code += " {\n"; + + if (p_input_vars[0] == String()) { + code += " vec2 __from_pos = vec2(0.0f);\n"; + } else { + code += " vec2 __from_pos = " + p_input_vars[0] + ".xy;\n"; + } + + if (p_input_vars[1] == String()) { + code += " vec2 __to_pos = vec2(0.0f);\n"; + } else { + code += " vec2 __to_pos = " + p_input_vars[1] + ".xy;\n"; + } + + code += "\n vec2 __at = __from_pos;\n"; + code += " float __max_dist = distance(__from_pos, __to_pos);\n"; + code += " vec2 __dir = normalize(__to_pos - __from_pos);\n\n"; + + code += " float __accum = 0.0f;\n"; + code += " while(__accum < __max_dist) {\n"; + code += " float __d = texture_sdf(__at);\n"; + code += " __accum += __d;\n"; + code += " if (__d < 0.01f) {\n"; + code += " break;\n"; + code += " }\n"; + code += " __at += __d * __dir;\n"; + code += " }\n"; + + code += " float __dist = min(__max_dist, __accum);\n"; + code += " " + p_output_vars[0] + " = __dist;\n"; + code += " " + p_output_vars[1] + " = __accum < __max_dist;\n"; + code += " " + p_output_vars[2] + " = vec3(__from_pos + __dir * __dist, 0.0f);\n"; + + code += " }\n"; + + return code; +} + +VisualShaderNodeSDFRaymarch::VisualShaderNodeSDFRaymarch() { + simple_decl = false; +} |