From dce5e7c57a26ca9c07fd414d04ed7bb97d29f14c Mon Sep 17 00:00:00 2001
From: themancalledjakob <jakob@jrkb.land>
Date: Thu, 13 Apr 2023 12:56:17 +0200
Subject: [PATCH] fun with ofxGPUfont

(single draw call for multiple texts)
---
 src/GPUFontAtlasLayerCombo.cpp | 49 +++++++++++++++++++++++++++-------
 1 file changed, 39 insertions(+), 10 deletions(-)

diff --git a/src/GPUFontAtlasLayerCombo.cpp b/src/GPUFontAtlasLayerCombo.cpp
index c7bdfab..87ce86b 100644
--- a/src/GPUFontAtlasLayerCombo.cpp
+++ b/src/GPUFontAtlasLayerCombo.cpp
@@ -56,7 +56,7 @@ void GPUFontAtlasLayerCombo::update(){
     //shaderCatalog->update();
     //}
     //#endif
-    float animationSpeed = ofMap(sin(ofGetElapsedTimef() * 0.01), -1, 1, 0.1, 2);
+    float animationSpeed = 1.0;
     float threshold = 1.0;
     for(int i = 0; i < fontVariationAxes.size(); i++){
         ofxGPUFont::Font::FontVariationAxis & axis = fontVariationAxes[i];
@@ -144,7 +144,7 @@ void GPUFontAtlasLayerCombo::draw(){
         glUniform1f(location, z);
 
         location = glGetUniformLocation(fontShaderProgram, "color");
-        glUniform4f(location, 1.0f, 0.0f, 0.0f, 0.5f);
+        glUniform4f(location, 1.0f, 1.0f, 1.0f, 0.5f);
 
         location = glGetUniformLocation(fontShaderProgram, "antiAliasingWindowSize");
         glUniform1f(location, (float)antiAliasingWindowSize);
@@ -156,18 +156,47 @@ void GPUFontAtlasLayerCombo::draw(){
 
         //mouse.x = 0;
         //mouse.y = 0;
-        float mx = ofMap(mouse.x, 0, width, -0.5 * width_unit, 0.5 * width_unit);
-        float my = ofMap(mouse.y, 0, height, -0.5 * height_unit, 0.5 * height_unit);
+        std::vector <ofxGPUFont::Font::BufferVertex> vertices;
+        std::vector <int32_t> indices;
+        string text = "whatever";
+        int n_texts = 240;
+        vertices.resize(text.length() * n_texts * 4);
+        indices.resize(text.length() * n_texts * 6);
         cx = 0.5f * (bb.minX + bb.maxX);
         cy = 0.5f * (bb.minY + bb.maxY);
+
+        for(int i = 0; i < n_texts - 1; i++){
+            float pipi = ((PI * 2 * i) / (n_texts - 1));
+            float shift = (400 * cos(ofGetElapsedTimef() * 0.125 + pipi));
+            float shift_x = (600 * sin(ofGetElapsedTimef() * 0.125 + pipi));
+            float shift_o = (100 * sin(ofGetElapsedTimef() * 0.4 + pipi));
+            font->collectVerticesAndIndices(
+                glm::vec3(mouse.x + shift_x,
+                          mouse.y + shift + shift_o,
+                          0),
+                text,
+                vertices,
+                indices,
+                true,
+                int(ofMap(sin(ofGetElapsedTimef() + pipi), -1, 1, 42, 96)));
+        }
+        font->collectVerticesAndIndices(
+            glm::vec3(mouse.x,
+                      mouse.y,
+                      0),
+            text,
+            vertices,
+            indices,
+            true,
+            ofMap(sin(ofGetElapsedTimef() * 0.25f), -1.0f, 1.0f, 42.0f, 96.0f));
+        font->draw(vertices, indices);
         //ofRectangle rectangle(0, 0, width, height);
         //ofDrawRectangle(rectangle);
-        font->draw(mouse.x, mouse.y - (200 * sin(ofGetElapsedTimef() * 0.25)), 0, "what", vFlip == V_FLIP_ON, 128.0f);
-        location = glGetUniformLocation(fontShaderProgram, "color");
-        glUniform4f(location, 0.0f, 1.0f, 0.0f, 0.5f);
-        font->draw(mouse.x, mouse.y, 0, "ever", vFlip == V_FLIP_ON, 64.0f);
-        glUniform4f(location, 0.0f, 0.0f, 1.0f, 0.5f);
-        font->draw(mouse.x, mouse.y + (200 * sin(ofGetElapsedTimef() * 0.25)), 0, "verraw", vFlip == V_FLIP_ON, 256.0f);
+        //font->draw(mouse.x, mouse.y - (200 * sin(ofGetElapsedTimef() * 0.25)), 0, "what", vFlip == V_FLIP_ON, 42.0f);
+        //location = glGetUniformLocation(fontShaderProgram, "color");
+        //glUniform4f(location, 0.0f, 1.0f, 0.0f, 0.5f);
+        //font->draw(mouse.x, mouse.y, 0, "ever", vFlip == V_FLIP_ON, 420.0f);
+
         glUseProgram(currentProgram);
     }