Implement Curve3Texture

* This was required by users in some scenarios, such as animating individual axes over time with a single texture.
* Examples: Shaders, Particles, etc.
* CurveTexture now defaults to RGB, can be changed to Red if needed, this allows to freely exchange them.

1 files changed, 53 insertions, 11 deletions

diff --git a/scene/resources/texture.h b/scene/resources/texture.h
index 40193e3ff6..73390039cb 100644
--- a/scene/resources/texture.h
+++ b/scene/resources/texture.h
@@ -586,11 +586,19 @@ public:
 class CurveTexture : public Texture2D {
 	GDCLASS(CurveTexture, Texture2D);
 	RES_BASE_EXTENSION("curvetex")
+public:
+	enum TextureMode {
+		TEXTURE_MODE_RGB,
+		TEXTURE_MODE_RED,
+	};
 
 private:
 	mutable RID _texture;
 	Ref<Curve> _curve;
 	int _width = 2048;
+	int _current_width = 0;
+	TextureMode texture_mode = TEXTURE_MODE_RGB;
+	TextureMode _current_texture_mode = TEXTURE_MODE_RGB;
 
 	void _update();
 
@@ -601,6 +609,9 @@ public:
 	void set_width(int p_width);
 	int get_width() const override;
 
+	void set_texture_mode(TextureMode p_mode);
+	TextureMode get_texture_mode() const;
+
 	void ensure_default_setup(float p_min = 0, float p_max = 1);
 
 	void set_curve(Ref<Curve> p_curve);
@@ -614,18 +625,49 @@ public:
 	CurveTexture();
 	~CurveTexture();
 };
-/*
-	enum CubeMapSide {
-		CUBEMAP_LEFT,
-		CUBEMAP_RIGHT,
-		CUBEMAP_BOTTOM,
-		CUBEMAP_TOP,
-		CUBEMAP_FRONT,
-		CUBEMAP_BACK,
-	};
 
-*/
-//VARIANT_ENUM_CAST( Texture::CubeMapSide );
+VARIANT_ENUM_CAST(CurveTexture::TextureMode)
+
+class Curve3Texture : public Texture2D {
+	GDCLASS(Curve3Texture, Texture2D);
+	RES_BASE_EXTENSION("curvetex")
+
+private:
+	mutable RID _texture;
+	Ref<Curve> _curve_x;
+	Ref<Curve> _curve_y;
+	Ref<Curve> _curve_z;
+	int _width = 2048;
+	int _current_width = 0;
+
+	void _update();
+
+protected:
+	static void _bind_methods();
+
+public:
+	void set_width(int p_width);
+	int get_width() const override;
+
+	void ensure_default_setup(float p_min = 0, float p_max = 1);
+
+	void set_curve_x(Ref<Curve> p_curve);
+	Ref<Curve> get_curve_x() const;
+
+	void set_curve_y(Ref<Curve> p_curve);
+	Ref<Curve> get_curve_y() const;
+
+	void set_curve_z(Ref<Curve> p_curve);
+	Ref<Curve> get_curve_z() const;
+
+	virtual RID get_rid() const override;
+
+	virtual int get_height() const override { return 1; }
+	virtual bool has_alpha() const override { return false; }
+
+	Curve3Texture();
+	~Curve3Texture();
+};
 
 class GradientTexture : public Texture2D {
 	GDCLASS(GradientTexture, Texture2D);