Processing specific VBO implementations

Author: ArtifactForms

src/main/java/engine/processing/ProcessingVBOCreationStrategy.java

@@ -0,0 +1,19 @@
+package engine.processing;
+
+import engine.vbo.VBO;
+import engine.vbo.VBOCreationStrategy;
+import processing.core.PGraphics;
+
+public class ProcessingVBOCreationStrategy implements VBOCreationStrategy {
+
+  private PGraphics graphics;
+
+  public ProcessingVBOCreationStrategy(PGraphics graphics) {
+    this.graphics = graphics;
+  }
+
+  @Override
+  public VBO create() {
+    return new VBOProcessing(graphics);
+  }
+}

src/main/java/engine/processing/VBOProcessing.java

@@ -0,0 +1,145 @@
+package engine.processing;
+
+import engine.render.Material;
+import engine.resources.FilterMode;
+import engine.resources.Texture;
+import engine.vbo.VBO;
+import math.Vector2f;
+import math.Vector3f;
+import mesh.Face3D;
+import mesh.Mesh3D;
+import processing.core.PApplet;
+import processing.core.PGraphics;
+import processing.core.PShape;
+
+public class VBOProcessing implements VBO {
+  private PShape shape;
+  private PGraphics graphics;
+  private int faceCount;
+  private int vertexCount;
+
+  public VBOProcessing(PGraphics graphics) {
+    this.graphics = graphics;
+  }
+
+  @Override
+  public void create(Mesh3D mesh, Material material) { // TODO Auto-generated method stub
+    faceCount = mesh.getFaceCount();
+    vertexCount = mesh.getVertexCount();
+
+    shape = graphics.createShape();
+
+    shape.beginShape();
+
+    shape.noStroke();
+
+    for (Face3D f : mesh.getFaces()) {
+      if (f.indices.length == 3) {
+        shape.beginShape(PApplet.TRIANGLES);
+      } else if (f.indices.length == 4) {
+        shape.beginShape(PApplet.QUADS);
+      } else {
+        shape.beginShape(PApplet.POLYGON);
+      }
+
+      //      applyTexture();
+
+      int[] indices = f.indices;
+      for (int i = 0; i < indices.length; i++) {
+        Vector3f v = mesh.vertices.get(f.indices[i]);
+        int uvIndex = f.getUvIndexAt(i);
+        if (uvIndex != -1) {
+          Vector2f uv = mesh.getUvAt(uvIndex);
+          shape.vertex(v.getX(), v.getY(), v.getZ(), uv.getX(), 1 - uv.getY());
+        } else {
+          shape.vertex(v.getX(), v.getY(), v.getZ());
+        }
+      }
+      //      shape.endShape();
+    }
+
+    shape.endShape();
+
+    Texture texture = material.getDiffuseTexture();
+    if (texture != null) {
+      ProcessingTexture processingTexture = (ProcessingTexture) texture.getBackendTexture();
+      shape.setTextureMode(PApplet.NORMAL);
+      shape.setTexture(processingTexture.getImage());
+    }
+  }
+
+  private int getSamplingMode(FilterMode filterMode) {
+    switch (filterMode) {
+      case POINT:
+        return 2;
+      case LINEAR:
+        return 3;
+      case BILINEAR:
+        return 4;
+      case TRILINEAR:
+        return 5;
+      default:
+        System.err.println("Warning: Unexpected filter mode value: " + filterMode);
+        return 4; // Default to BILINEAR
+    }
+  }
+
+  @Override
+  public void create(float[] vertices, int[] indices) {
+    // Create a PShape object for the mesh
+    //    shape = new PShape(PShape.POINTS, vertices.length / 3);
+    shape = new PShape();
+
+    // Load vertices into the PShape
+    shape.beginShape();
+    for (int i = 0; i < vertices.length; i += 3) {
+      shape.vertex(vertices[i], vertices[i + 1], vertices[i + 2]);
+    }
+    shape.endShape();
+
+    // Optional: store indices if using indexed rendering
+    vertexCount = vertices.length / 3; // Assuming vertices are in 3D (x, y, z)
+  }
+
+  @Override
+  public void bind() {
+    // Binding is not necessary for PShape in Processing
+    // Processing automatically handles the shape for rendering
+  }
+
+  @Override
+  public void unbind() {
+    // Unbinding is not needed in Processing as it handles rendering context automatically
+  }
+
+  @Override
+  public void updateData(float[] newData) {
+    // Update the vertices in the PShape
+    shape.beginShape();
+    for (int i = 0; i < newData.length; i += 3) {
+      shape.vertex(newData[i], newData[i + 1], newData[i + 2]);
+    }
+    shape.endShape();
+  }
+
+  @Override
+  public void delete() {
+    // In Processing, there's no explicit delete method for PShape
+    shape = null;
+  }
+
+  @Override
+  public int getVertexCount() {
+    return vertexCount;
+  }
+
+  @Override
+  public int getFaceCount() { // TODO Auto-generated method stub
+    return faceCount;
+  }
+
+  public void draw(PGraphics graphics) {
+    // Use Processing's drawing methods to render the shape
+    graphics.shape(shape, 0, 0);
+  }
+}