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arielmarielm
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Starting with DrawingLotsOf2dText
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7 files changed

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‎sketches/DrawingLotsOf2dText/CMakeLists.txt

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cmake_minimum_required (VERSION 3.2.2)
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project(DrawingLotsOf2dText)
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set(INCLUDE_DIRS
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$ENV{CODE_PATH}
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)
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set(SRC_FILES
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"src/Sketch.cpp"
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"$ENV{CODE_PATH}/common/xf/Font.cpp"
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"$ENV{CODE_PATH}/common/xf/FontManager.cpp"
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"$ENV{CODE_PATH}/common/xf/FontSequence.cpp"
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"$ENV{CODE_PATH}/common/quad/QuadBatch.cpp"
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)
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#
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# For Mojave and up
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#
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add_compile_definitions(
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GL_SILENCE_DEPRECATION
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)
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include("$ENV{CROSS_PATH}/core/cmake/sketch.cmake")
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include("$ENV{CROSS_PATH}/core/cmake/test.cmake")

‎sketches/DrawingLotsOf2dText/CTestConfig.cmake

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set(CTEST_PROJECT_NAME DrawingLotsOf2dText)
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set(CTEST_CONFIGURATION_TYPE Release)
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if (PLATFORM MATCHES osx|linux)
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set(ARGS
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-DRUN=EXE
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)
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elseif (PLATFORM MATCHES emscripten)
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set(ARGS
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-DRUN=BROWSER
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)
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endif()
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include("$ENV{CROSS_PATH}/core/cmake/platforms.cmake")

‎sketches/DrawingLotsOf2dText/res/Georgia_Regular_64.fnt

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‎sketches/DrawingLotsOf2dText/res/song.txt

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From the ice-age to the dole-age
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There is but one concern
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I have just discovered
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Some girls are bigger than others
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Some girls are bigger than others
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Some girls mothers are bigger than other girls' mothers
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Some girls are bigger than others
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Some girls are bigger than others
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Some girls mothers are bigger than other girls' mothers
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As Antony said to Cleopatra
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As he opened a crate of ale
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Oh, I say
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Some girls are bigger than others
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Some girls are bigger than others
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Some girls mothers are bigger than other girls' mothers
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Some girls are bigger than others
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Some girls are bigger than others
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Some girls mothers are bigger than other girls' mothers
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And I'll send you mine

‎sketches/DrawingLotsOf2dText/src/Sketch.cpp

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#include "Sketch.h"
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using namespace std;
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using namespace chr;
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using namespace gl;
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void Sketch::setup()
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{
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auto lines = utils::readLines<u16string>(InputSource::resource("song.txt"));
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u16string text;
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for (const auto &line : lines)
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{
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text += line + u" ";
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}
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font = fontManager.getFont(InputSource::resource("Georgia_Regular_64.fnt"), XFont::Properties2d());
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font->setShader(textureAlphaShader);
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font->setSize(16);
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font->setColor(0, 0, 0, 1);
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font->beginSequence(sequence);
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drawTextSpiral(*font, text, 30, 800, 33, 0, XFont::ALIGN_MIDDLE);
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font->endSequence();
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// ---
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glDisable(GL_DEPTH_TEST);
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glDepthMask(GL_FALSE);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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void Sketch::draw()
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{
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glClearColor(1, 1, 1, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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// ---
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auto projectionMatrix = glm::ortho(0.0f, windowInfo.width, 0.0f, windowInfo.height);
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Matrix modelViewMatrix;
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modelViewMatrix
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.translate(windowInfo.center())
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.scale(1, -1)
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.rotateZ(clock()->getTime() * 1.0f);
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gl::State()
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.setShaderMatrix(modelViewMatrix * projectionMatrix)
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.apply();
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// ---
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font->replaySequence(sequence);
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}
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void Sketch::drawTextSpiral(XFont &font, const u16string &text, float r1, float r2, float turns, float offset, chr::XFont::Alignment alignY)
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{
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float l = TWO_PI * turns;
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float dr = (r2 - r1) / l;
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float offsetY = font.getOffsetY(alignY);
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Matrix matrix;
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for (auto c : text)
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{
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auto glyphIndex = font.getGlyphIndex(c);
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float halfWidth = font.getGlyphAdvance(glyphIndex) / 2;
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offset += halfWidth;
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if (glyphIndex >= 0)
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{
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float r = sqrtf(r1 * r1 + 2 * dr * offset);
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float d = (r - r1) / dr;
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matrix
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.setTranslate(cosf(-d) * r, sinf(-d) * r)
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.rotateZ(-d - HALF_PI);
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font.addGlyph(matrix, glyphIndex, -halfWidth, offsetY);
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}
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offset += halfWidth;
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}
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}

‎sketches/DrawingLotsOf2dText/src/Sketch.h

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#pragma once
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#include "chr/cross/Context.h"
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#include "chr/gl/Batch.h"
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#include "chr/gl/shaders/TextureAlphaShader.h"
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#include "common/xf/FontManager.h"
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class Sketch : public chr::CrossSketch
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{
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public:
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void setup() final;
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void draw() final;
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protected:
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chr::xf::FontManager fontManager;
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std::shared_ptr<chr::XFont> font;
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chr::xf::FontSequence sequence;
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chr::gl::shaders::TextureAlphaShader textureAlphaShader;
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static void drawTextSpiral(chr::XFont &font, const std::u16string &text, float r1, float r2, float turns, float offset, chr::XFont::Alignment alignY);
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};

‎sketches/DrawingLotsOf2dText/src/main.cpp

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#include "Sketch.h"
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namespace chr
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{
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CrossSketch* createSketch()
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{
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return new Sketch();
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}
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}
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#if defined(CHR_PLATFORM_DESKTOP)
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int main(int argc, char** argv)
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{
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chr::CrossSketch::run(1200, 900, 4);
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return 0;
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}
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#elif defined(CHR_PLATFORM_EMSCRIPTEN)
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int main(int argc, char** argv)
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{
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chr::CrossSketch::run(4);
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return 0;
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}
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#endif

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