86 lines
2.4 KiB
Java
86 lines
2.4 KiB
Java
package renderEngine;
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import java.util.List;
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import java.util.Map;
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import org.atriaSoft.etk.math.Matrix4f;
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import org.atriaSoft.etk.math.Vector2f;
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import org.lwjgl.opengl.GL11;
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import org.lwjgl.opengl.GL13;
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import org.lwjgl.opengl.GL20;
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import org.lwjgl.opengl.GL30;
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import org.lwjgl.system.windows.DISPLAY_DEVICE;
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import entities.Entity;
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import models.RawModel;
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import models.TexturedModel;
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import shaders.StaticShader;
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import textures.ModelTexture;
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import toolbox.Maths;
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/**
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* Handles the rendering of a model to the screen.
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*
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* @author Karl
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*
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*/
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public class EntityRenderer {
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private StaticShader shader;
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public EntityRenderer(StaticShader shader, Matrix4f projectionMatrix) {
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this.shader = shader;
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shader.start();
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shader.loadProjectionMatrix(projectionMatrix);
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shader.stop();
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}
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public void render(Map<TexturedModel, List<Entity>> entities) {
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for (TexturedModel model:entities.keySet()) {
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prepareTexturedModel(model);
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List<Entity> batch = entities.get(model);
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for (Entity entity:batch) {
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prepareInstance(entity);
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GL11.glDrawElements(GL11.GL_TRIANGLES, model.getRawModel().getVertexCount(), GL11.GL_UNSIGNED_INT, 0);
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}
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unbindTexturedModel();
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}
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}
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private void prepareTexturedModel(TexturedModel model) {
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RawModel rawModel = model.getRawModel();
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GL30.glBindVertexArray(rawModel.getVaoID());
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GL20.glEnableVertexAttribArray(0);
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GL20.glEnableVertexAttribArray(1);
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GL20.glEnableVertexAttribArray(2);
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ModelTexture texture = model.getTexture();
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if (texture.isHasTransparency()) {
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MasterRenderer.disableCulling();
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}
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shader.loadFakeLightingVariable(texture.isUseFakeLighting());
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shader.loadShineVariable(texture.getShineDamper(), texture.getReflectivity());
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GL13.glActiveTexture(GL13.GL_TEXTURE0);
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GL11.glBindTexture(GL11.GL_TEXTURE_2D, model.getTexture().getTexturedID());
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}
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private void unbindTexturedModel() {
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MasterRenderer.enableCulling();
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GL20.glDisableVertexAttribArray(0);
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GL20.glDisableVertexAttribArray(1);
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GL20.glDisableVertexAttribArray(2);
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GL30.glBindVertexArray(0);
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}
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private void prepareInstance(Entity entity) {
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Matrix4f transformationMatrix = Maths.createTransformationMatrix(entity.getPosition(), entity.getRotation(), entity.getScale());
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shader.loadTransformationMatrix(transformationMatrix);
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}
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}
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