finished tutorial 03

tutorials/03-minecraft/src/tutorial_03.cpp

@@ -0,0 +1,102 @@
+/*
+# _____        ____   ___
+#   |     \/   ____| |___|
+#   |     |   |   \  |   |
+#-----------------------------------------------------------------------
+# Copyright 2022, tyra - https://github.com/h4570/tyra
+# Licensed under Apache License 2.0
+# Sandro Sobczyński <sandro.sobczynski@gmail.com>
+*/
+
+#include <tyra>
+#include "tutorial_03.hpp"
+
+namespace Tyra {
+
+Tutorial03::Tutorial03(Engine* t_engine) : engine(t_engine) {
+  textureAtlas = nullptr;
+}
+
+Tutorial03::~Tutorial03() {
+  if (textureAtlas != nullptr) {
+    engine->renderer.core.texture.repository.free(textureAtlas);
+  }
+}
+
+void Tutorial03::init() {
+  loadTexture();
+
+  engine->renderer.setClearScreenColor(Color(32.0F, 32.0F, 32.0F));
+
+  cameraPosition = Vec4(0.0F, 0.0F, -10.0F);  // Move camera one step back
+  cameraLookAt.unit();                        // Look at the origin - (0,0,0)
+
+  /** Every 3D pipeline, needs to set RendererCore to it */
+  mcpip.setRenderer(&engine->renderer.core);
+
+  blocks.push_back(getBlock(0, 1, 2.0F));
+  blocks.push_back(getBlock(4, 0, -2.0F));
+}
+
+void Tutorial03::loop() {
+  rotateBlock(blocks[0]);
+  rotateBlock(blocks[1]);
+
+  /** Set camera info */
+  engine->renderer.beginFrame(CameraInfo3D(&cameraPosition, &cameraLookAt));
+  {
+    /**
+     * usePipeline() uploads pipeline's VU1 programs into VU1 memory and allows
+     * us to use it.
+     */
+    engine->renderer.renderer3D.usePipeline(mcpip);
+    {
+      /** Render cobblestone */
+      mcpip.render({&blocks[0].renderData}, textureAtlas);
+
+      /** Render block using 6 textures from atlas (top-bottom) */
+      mcpip.render({&blocks[1].renderData}, textureAtlas, true);
+    }
+  }
+  engine->renderer.endFrame();
+}
+
+void Tutorial03::loadTexture() {
+  auto& repo = engine->renderer.getTextureRepository();
+  textureAtlas = repo.add(FileUtils::fromCwd("atlas.png"));
+}
+
+TutorialBlock Tutorial03::getBlock(const u8& atlasX, const u8& atlasY,
+                                   const float& translationX) {
+  TutorialBlock result;
+
+  // --- Set texture atlas offset
+
+  const u8 texturesInAtlasRow = 16;
+  const float textureOffset = 1.0F / texturesInAtlasRow;
+
+  /**
+   * Offset is X/Y coordinate of left up texture corner.
+   * Percentage is in range of 0.0F to 1.0F.
+   */
+  result.atlasOffset = Vec4(atlasX * textureOffset, atlasY * textureOffset);
+
+  // --- Set default color
+
+  result.color = Color(128.0F, 128.0F, 128.0F, 128.0F);
+
+  result.translation.translateX(translationX);
+
+  /** Build final matrix which will be used in renderer */
+  result.updateModelMatrix();
+
+  return result;
+}
+
+void Tutorial03::rotateBlock(TutorialBlock& block) {
+  block.rotation.rotate(Vec4(0.01F, 0.02F, 0.03F));
+
+  block.updateModelMatrix();
+}
+
+}  // namespace Tyra