From 9ef692ab5dd16671b4d5bee6ec1347705c3b154c Mon Sep 17 00:00:00 2001
From: sebastian <s.boeckelmann3@gmail.com>
Date: Sun, 15 Feb 2026 16:45:32 +0100
Subject: [PATCH] FIX: Correctly Positioning Rendered Texts

---
 src/engine/core/gui/uiComponent/UiButton.cpp |  7 +++-
 src/engine/core/gui/uiComponent/UiButton.h   |  2 +-
 src/engine/renderer/TextRenderer.cpp         | 44 +++++++++-----------
 3 files changed, 26 insertions(+), 27 deletions(-)

diff --git a/src/engine/core/gui/uiComponent/UiButton.cpp b/src/engine/core/gui/uiComponent/UiButton.cpp
index 81205c2..df8a91b 100644
--- a/src/engine/core/gui/uiComponent/UiButton.cpp
+++ b/src/engine/core/gui/uiComponent/UiButton.cpp
@@ -7,11 +7,16 @@
 #include <utility>
 
 #include "UiText.h"
+#include "../text/Font.h"
 
-UiButton::UiButton(const GLuint textureID, std::string label, Font &font, const LayoutStyle &style): ClickableUiComponent(style), text(std::move(label)), font(font), textureID(textureID) {
+UiButton::UiButton(const GLuint textureID, std::string label, Font &font, LayoutStyle &style): ClickableUiComponent(style), text(std::move(label)), font(font), textureID(textureID) {
     visualStyles[UiEventType::NONE] = {1.0f, glm::vec3(0.0f), 0.0f};
     visualStyles[UiEventType::MOUSE_OVER] = {1.15f, glm::vec3(0.0f), 0.0f};
     visualStyles[UiEventType::MOUSE_CLICK] = {1.0f, glm::vec3(0.3f, 0.6f, 1.0f), 0.15f};
+
+    style.width = SizeValue(font.getTextWidth(label, 1.0f), SizeUnit::Pixels);
+    style.height = SizeValue(font.getLineHeight(), SizeUnit::Pixels);
+
 }
 
 void UiButton::onCollectRenderData(UiRenderBundle &uiRenderBundle) {
diff --git a/src/engine/core/gui/uiComponent/UiButton.h b/src/engine/core/gui/uiComponent/UiButton.h
index bcc6043..71f1c3d 100644
--- a/src/engine/core/gui/uiComponent/UiButton.h
+++ b/src/engine/core/gui/uiComponent/UiButton.h
@@ -12,7 +12,7 @@ class Font;
 
 class UiButton : public ClickableUiComponent {
 public:
-    UiButton(GLuint textureID, std::string label, Font& font, const LayoutStyle& style);
+    UiButton(GLuint textureID, std::string label, Font& font, LayoutStyle& style);
 
 protected:
     void onCollectRenderData(UiRenderBundle &uiRenderBundle) override;
diff --git a/src/engine/renderer/TextRenderer.cpp b/src/engine/renderer/TextRenderer.cpp
index f2560c5..041c1cc 100644
--- a/src/engine/renderer/TextRenderer.cpp
+++ b/src/engine/renderer/TextRenderer.cpp
@@ -92,34 +92,23 @@ void TextRenderer::renderGuiTexts(const std::vector<std::shared_ptr<GUIText>> &t
 }
 
 void TextRenderer::renderGuiText(const GUIText &text) {
+    glm::vec2 textPos = text.getPosition();
+    glm::vec2 textSize = text.getSize();
+
     const Font& font = text.getFont();
+    const std::string& string = text.getText();
+
+    float screenX = textPos.x * Application::getInstance().getWindow().GetWidth();
+    float screenY = (1.f - textPos.y) * Application::getInstance().getWindow().GetHeight();
+
+    float textHeight = font.getAscent() - font.getDescent(); // ascent - descent
+    float buttonWidthPx = textSize.x * Application::getInstance().getWindow().GetWidth();
+    float x = screenX + (buttonWidthPx - font.getTextWidth(text.getText(), 1.0f)) * 0.5f;
+    float y = screenY - textHeight  - font.getDescent();
+
     float scale = 1.0f;
-
-    const auto screenWidth  = static_cast<float>(Application::getInstance().getWindow().GetWidth());
-    const auto screenHeight = static_cast<float>(Application::getInstance().getWindow().GetHeight());
-
-    float x = text.getPosition().x * screenWidth;
-    float y = (1.f - text.getPosition().y) * screenHeight;
-
-    const float textWidth  = font.getTextWidth(text.getText(), scale);
-
-    const float buttonHeightPx = text.getSize().y * screenHeight;
-
-    const float ascent  = font.getAscent();
-    const float descent = font.getDescent(); // negativ!
-
-    const float textVisualHeight = ascent - descent;
-
-    // Button-Mitte
-    const float buttonCenterY = y - buttonHeightPx * 0.5f;
-
-    // Zentrieren
-    x += (text.getSize().x  * screenWidth  - textWidth)  * 0.5f;
-    y -= buttonCenterY + textVisualHeight * 0.5f - descent;
-
-
     shader.loadTextColor(glm::vec3(1.0f));
-    for (char c : text.getText()) {
+    for (char c : string) {
         const Font::Character& ch = font.getCharacter(c);
 
         float xpos = x + static_cast<float>(ch.bearing.x) * scale;
@@ -141,6 +130,7 @@ void TextRenderer::renderGuiText(const GUIText &text) {
         glBindVertexArray(textModel.vaoID);
         glEnableVertexAttribArray(0);
 
+        glActiveTexture(GL_TEXTURE0);
         glBindTexture(GL_TEXTURE_2D, ch.textureID);
 
 
@@ -154,8 +144,12 @@ void TextRenderer::renderGuiText(const GUIText &text) {
         glBindVertexArray(0);
         glDisableVertexAttribArray(0);
     }
+
+    glBindTexture(GL_TEXTURE_2D, 0);
 }
 
+
+
 glm::mat4 TextRenderer::calculateOrthographicProjectionMatrix() {
     const auto screenWidth = static_cast<float>(Application::getInstance().getWindow().GetWidth());
     const auto screenHeight = static_cast<float>(Application::getInstance().getWindow().GetHeight());