From 1fe5dceef2df8cb7a67e0760507be418bee754b8 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@getdrop.com>
Date: Tue, 16 Aug 2022 16:44:55 +0100
Subject: animate with timing

---
 lasertext/src/ofApp.cpp | 16 +++++++---------
 lasertext/src/ofApp.h   | 24 +++++++++++++++++-------
 2 files changed, 24 insertions(+), 16 deletions(-)

(limited to 'lasertext/src')

diff --git a/lasertext/src/ofApp.cpp b/lasertext/src/ofApp.cpp
index 2974056..96b56ab 100644
--- a/lasertext/src/ofApp.cpp
+++ b/lasertext/src/ofApp.cpp
@@ -5,10 +5,6 @@
 what do we want to store/control per letter?
 */
 
-
-int MAX_POINTS=40000;
-int LASER_INTENSITY=128;
-
 //--------------------------------------------------------------
 void ofApp::setup(){
 	fonts.open("fonts/");
@@ -20,10 +16,11 @@ void ofApp::setup(){
 	banner.loadFont("fonts/EMSPepita.svg"); //fonts.getPath(currentFont));
 	banner.init("Everything Is Going To Be Alright");
 
-	laser.set_pts(MAX_POINTS);
-    laser.set_intensity(LASER_INTENSITY);
+    textgui.setup("text","",5,680);
+	textgui.add(text_scale.set("scale", 1.0f, 0.5f, 3.0f));
+    textgui.add(text_speed.set("speed", 1.0f, 0.0f, 2.0f));
 
-    lasergui.setup("laser","",5,700);
+    lasergui.setup("laser","",5,750);
 	lasergui.add(laser_power.set("power", true));
     lasergui.add(laser_intensity.set("intensity", 30, 0, 255));
     lasergui.add(laser_points.set("points", 30000, 0, 40000));
@@ -41,7 +38,7 @@ void ofApp::setup(){
 }
 //--------------------------------------------------------------
 void ofApp::update(){
-	banner.update(1.0f);
+	banner.update(text_speed);
 
 	laser.set_pts(laser_points);
 	laser.set_subdivide(laser_subdivide);
@@ -56,9 +53,10 @@ void ofApp::draw(){
 	ofBackground(0,0,0);
 	ofSetColor(255,255,255);
 
+	textgui.draw();
 	lasergui.draw();
 
-	vector<colourPolyline> shapes = banner.getOutlines(0.08f); //+(0.02f*sin(ofGetElapsedTimef()*.1f)));
+	vector<colourPolyline> shapes = banner.getOutlines(0.08f*text_scale); //+(0.02f*sin(ofGetElapsedTimef()*.1f)));
 
 	int num = 0;
 
diff --git a/lasertext/src/ofApp.h b/lasertext/src/ofApp.h
index 3fcde84..5ca1895 100644
--- a/lasertext/src/ofApp.h
+++ b/lasertext/src/ofApp.h
@@ -50,6 +50,7 @@ class glyphbanner{
 	vector<colourPolyline> outlines;
 	ofVec2f centre;
 	float lastUpdateTime;
+	float playhead;
 	float enspace;
 	vector<string> split(string s) {
 	    size_t pos_start = 0, pos_end;
@@ -70,6 +71,7 @@ public:
 	void init(string message){
 		createWords(message);
 		lastUpdateTime=ofGetElapsedTimef();
+		playhead=0.0f;
 	}
 	int length(){
 		int l=0;
@@ -177,27 +179,31 @@ public:
 		}
 	}
 	void clear(){words.clear();}
-	void update(float period=1.0f){
-		float t=ofGetElapsedTimef()/period;
+	void update(float speed=1.0f){
+
+		float delta=ofGetElapsedTimef()-lastUpdateTime;
+		lastUpdateTime=ofGetElapsedTimef();
+		playhead+=delta*speed;
+
 		int theword=0;
 		float segment=0.0f;
 		if (false){ //1 word per second
-			theword=int(t)%words.size();
-			segment=t-int(t);
+			theword=int(playhead)%words.size();
+			segment=playhead-int(playhead);
 		}
 		else { //proportional to #of letters
-			int theletter=int(t)%glyphCount();
+			int theletter=int(playhead)%glyphCount();
 			theword=0;
 			while((theletter-=words[theword].glyphs.size())>0){
 				theword++;
 			}
-			segment=(((float)theletter+words[theword].glyphs.size()+t-int(t))/words[theword].glyphs.size());
+			segment=(((float)theletter+words[theword].glyphs.size()+playhead-int(playhead))/words[theword].glyphs.size());
 		}
 		//calculate params for word/letter anim
 		for (int i=0;i<words.size();i++){
 			words[i].amount=(i==theword?sin(segment*3.1415):0);
 			for (auto& g:words[i].glyphs){
-				if (ofRandom(period)<0.01) {
+				if (ofRandom(100)<speed) {
 					g.randomiseColour();
 				}
 			}
@@ -252,6 +258,10 @@ class ofApp : public ofBaseApp{
         string displaytext;
         glyphbanner banner;
 
+        ofxPanel textgui;
+		ofParameter<float> text_scale;
+        ofParameter<float> text_speed;
+
         //======= laser gui
 
 		ofxPanel lasergui;
-- 
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