move 3d texts rendering code to TextsRenderer

src/graphics/render/TextsRenderer.cpp

@@ -0,0 +1,104 @@
+#include "TextsRenderer.hpp"
+
+#include "TextNote.hpp"
+#include "maths/util.hpp"
+#include "assets/Assets.hpp"
+#include "window/Camera.hpp"
+#include "maths/FrustumCulling.hpp"
+#include "graphics/core/Font.hpp"
+#include "graphics/core/Batch3D.hpp"
+#include "graphics/core/Shader.hpp"
+#include "presets/NotePreset.hpp"
+
+TextsRenderer::TextsRenderer(const Frustum* frustum) : frustum(frustum) {
+}
+
+void TextsRenderer::renderText(
+    Batch3D& batch,
+    const TextNote& note,
+    const DrawContext& context,
+    const Assets& assets,
+    const Camera& camera,
+    const EngineSettings& settings,
+    bool hudVisible
+) {
+    const auto& text = note.getText();
+    const auto& preset = note.getPreset();
+    const auto& pos = note.getPosition();
+
+    if (util::distance2(pos, camera.position) >
+        util::sqr(preset.renderDistance / camera.zoom)) {
+        return;
+    }
+
+    // Projected notes are displayed on the front layer only
+    if (preset.displayMode == NoteDisplayMode::PROJECTED) {
+        return;
+    }
+    auto& font = assets.require<Font>("normal");
+
+    glm::vec3 xvec {1, 0, 0};
+    glm::vec3 yvec {0, 1, 0};
+
+    int width = font.calcWidth(text, text.length());
+    if (preset.displayMode == NoteDisplayMode::Y_FREE_BILLBOARD ||
+        preset.displayMode == NoteDisplayMode::XY_FREE_BILLBOARD) {
+        xvec = camera.position - pos;
+        xvec.y = 0;
+        std::swap(xvec.x, xvec.z);
+        xvec.z *= -1;
+        xvec = glm::normalize(xvec);
+        if (preset.displayMode == NoteDisplayMode::XY_FREE_BILLBOARD) {
+            yvec = camera.up;
+        }
+    }
+
+    if (preset.displayMode != NoteDisplayMode::PROJECTED) {
+        if (!frustum->isBoxVisible(pos - xvec * (width * 0.5f), 
+                                   pos + xvec * (width * 0.5f))) {
+            return;
+        }
+    }
+
+    batch.setColor(preset.color);
+    font.draw(
+        batch,
+        text,
+        pos - xvec * (width * 0.5f) * preset.scale,
+        xvec * preset.scale,
+        yvec * preset.scale
+    );
+}
+
+void TextsRenderer::renderTexts(
+    Batch3D& batch,
+    const DrawContext& context,
+    const Assets& assets,
+    const Camera& camera,
+    const EngineSettings& settings,
+    bool hudVisible,
+    bool frontLayer
+) {
+    std::vector<TextNote> notes;
+    NotePreset preset;
+    preset.displayMode = NoteDisplayMode::STATIC_BILLBOARD;
+    preset.color = glm::vec4(0, 0, 0, 1);
+    preset.scale = 0.005f;
+
+    notes.emplace_back(
+        L"Segmentation fault",
+        std::move(preset),
+        glm::vec3(0.5f, 99.5f, 0.0015f)
+    );
+    auto& shader = assets.require<Shader>("ui3d");
+    
+    shader.use();
+    shader.uniformMatrix("u_projview", camera.getProjView());
+    shader.uniformMatrix("u_apply", glm::mat4(1.0f));
+    batch.begin();
+
+    for (const auto& note : notes) {
+        renderText(batch, note, context, assets, camera, settings, hudVisible);
+    }
+    batch.flush();
+}