From 9148f5cb963f05973a5e3d403e6c554f775ff642 Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Thu, 26 Jan 2023 09:53:29 -0500
Subject: ProjectX/Y/Z

---
 src/main.rs |  2 --
 src/sdf.rs  | 21 +++++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/main.rs b/src/main.rs
index 4403252..5f94c12 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,7 @@
 /*
 @TODO:
-- let user go back&forth through past sdfs using scenes.txt file
 - RnToRn functions (& add back in RToR)
  -  also add PerComponent(Box<RToR>,Box<RToR>,Box<RToR>) in R3ToR3
-- ProjectX, ProjectY, ProjectZ in R3ToR?
 - documentation
 - GenRandom integers (just use 0..u32::MAX and add a modulus)
 - blender-style rendering the picture in multiple frames
diff --git a/src/sdf.rs b/src/sdf.rs
index 929c324..8a68c06 100644
--- a/src/sdf.rs
+++ b/src/sdf.rs
@@ -261,6 +261,12 @@ pub enum R3ToR {
 	#[prob(2)]
 	#[only_if(params.max_depth >= 0)]
 	Min(Box<R3ToR>, Box<R3ToR>),
+	#[prob(0.1)]
+	ProjectX,
+	#[prob(0.1)]
+	ProjectY,
+	#[prob(0.1)]
+	ProjectZ,
 }
 
 impl R3ToR3 {
@@ -685,6 +691,21 @@ impl Function for R3ToR {
 				let f_output = f.to_glsl(pre_output, code, var);
 				post.to_glsl(f_output, code, var)
 			}
+			ProjectX => {
+				let output = var.next();
+				write_str!(code, "float {output} = {input}.x;\n");
+				output
+			}
+			ProjectY => {
+				let output = var.next();
+				write_str!(code, "float {output} = {input}.y;\n");
+				output
+			}
+			ProjectZ => {
+				let output = var.next();
+				write_str!(code, "float {output} = {input}.z;\n");
+				output
+			}
 		}
 	}
 }
-- 
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