Method standard

src/main/java/field/graphics/BaseMesh.java:304–351

(int numVertex, int numElements, int primitiveType, int primitiveSize)

	}

	static public BaseMesh standard(int numVertex, int numElements, int primitiveType, int primitiveSize) {
		BaseMesh m = new BaseMesh() {
			protected boolean performNow() {

				if (GraphicsContext.getContext().stateTracker.shader.get() == 0) {
					System.err.println("trying to draw geometry (" + this + ") without a shader attached will draw nothing");
					return true;
				}

				GraphicsContext.checkError(() -> "on entry " + this);

				int ii = instances.get();

				if (ii == 0) {
					if (primitiveSize == 0) {
						glDrawArrays(primitiveType, 0, limitVertex);
					} else {
						Log.log("graphics.trace", () -> "drawing " + primitiveType + " " + limitElement + " " + primitiveSize + " " + GraphicsContext.getContext()
							.stateTracker.fbo.get());
						Log.log("graphics.trace", () -> "target FBO is complete ? " + GL30.glCheckFramebufferStatus(GL30.GL_DRAW_FRAMEBUFFER));
						GraphicsContext.checkError(() -> "before draw " + this);
						glDrawElements(primitiveType, limitElement * primitiveSize, GL_UNSIGNED_INT, 0);
						GraphicsContext.checkError(() -> "after draw " + this);
					}
				} else {
					if (primitiveSize == 0) {
						glDrawArraysInstanced(primitiveType, 0, limitVertex, ii);
					} else {
						Log.log("graphics.trace", () -> "drawing " + primitiveType + " " + limitElement + " " + primitiveSize + " " + GraphicsContext.getContext()
							.stateTracker.fbo.get());
						Log.log("graphics.trace", () -> "target FBO is complete ? " + GL30.glCheckFramebufferStatus(GL30.GL_DRAW_FRAMEBUFFER));
						GraphicsContext.checkError(() -> "before draw " + this);
						glDrawElementsInstanced(primitiveType, limitElement * primitiveSize, GL_UNSIGNED_INT, 0, ii);
						GraphicsContext.checkError(() -> "after draw " + this);
					}

				}
				GraphicsContext.checkError(() -> "on exit " + this);
				return true;
			}
		};
		m.setVertexMax(numVertex);
		if (primitiveSize > 0) {
			m.setElements(new SimpleArrayBuffer(numElements, GL_ELEMENT_ARRAY_BUFFER, -1, primitiveSize, 0));
			m.setElementMax(numElements);
		}
		return m;
	}

	/**
	 * returns a new BaseMesh that draws up to numPoints.