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fun with ofxGPUfont

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(single draw call for multiple texts)
This commit is contained in:
jrkb 2023-04-13 12:56:17 +02:00
parent 7016b0629f
commit dce5e7c57a
1 changed files with 39 additions and 10 deletions
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49
src/GPUFontAtlasLayerCombo.cpp
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@ -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);
}