104 lines
4.1 KiB
Java
104 lines
4.1 KiB
Java
package zone.oat.gmodtitlescreen.screen;
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import com.mojang.blaze3d.platform.GlStateManager;
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import com.mojang.blaze3d.systems.RenderSystem;
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import net.fabricmc.api.EnvType;
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import net.fabricmc.api.Environment;
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import net.minecraft.client.render.GameRenderer;
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import net.minecraft.client.texture.TextureManager;
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import net.minecraft.client.util.math.MatrixStack;
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import net.minecraft.client.util.math.Vector2f;
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import net.minecraft.util.Identifier;
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import net.minecraft.util.math.MathHelper;
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import net.minecraft.util.math.Vec3f;
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import zone.oat.gmodtitlescreen.ModIdentifier;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.Executor;
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import static net.minecraft.client.gui.DrawableHelper.drawTexture;
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@Environment(EnvType.CLIENT)
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public class SlideshowBackground {
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private static final Identifier[] BACKGROUNDS = {
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new ModIdentifier("textures/gui/title/background/background_0.png"),
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new ModIdentifier("textures/gui/title/background/background_1.png"),
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new ModIdentifier("textures/gui/title/background/background_2.png"),
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new ModIdentifier("textures/gui/title/background/background_3.png"),
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new ModIdentifier("textures/gui/title/background/background_4.png"),
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new ModIdentifier("textures/gui/title/background/background_5.png"),
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new ModIdentifier("textures/gui/title/background/background_6.png"),
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};
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private static final Integer[][] BACKGROUND_SIZES = {
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{960, 528},
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{960, 528},
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{960, 528},
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{960, 528},
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{960, 528},
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{960, 528},
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{960, 528},
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};
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private static final float SLIDESHOW_IMAGE_LENGTH = 400f;
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private static final float TRANSITION_LENGTH = 30f;
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private static float t = TRANSITION_LENGTH;
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public static CompletableFuture<Void> loadBackgroundTexturesAsync(TextureManager textureManager, Executor executor) {
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CompletableFuture<?>[] completableFutures = new CompletableFuture[BACKGROUNDS.length];
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for(int i = 0; i < completableFutures.length; ++i) {
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completableFutures[i] = textureManager.loadTextureAsync(BACKGROUNDS[i], executor);
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}
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return CompletableFuture.allOf(completableFutures);
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}
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private static void renderBackground(MatrixStack matrices, float a, int backgroundIndex, float alpha, int width, int height) {
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matrices.push();
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Identifier bg = BACKGROUNDS[backgroundIndex];
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Integer[] backgroundSize = BACKGROUND_SIZES[backgroundIndex];
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float baseScale = Math.max(width / (float) backgroundSize[0], height / (float) backgroundSize[1]);
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Vector2f overscan = new Vector2f(backgroundSize[0] * baseScale - width, backgroundSize[1] * baseScale - height);
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RenderSystem.setShader(GameRenderer::getPositionTexShader);
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RenderSystem.setShaderTexture(0, bg);
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RenderSystem.enableBlend();
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RenderSystem.blendFunc(GlStateManager.SrcFactor.SRC_ALPHA, GlStateManager.DstFactor.ONE_MINUS_SRC_ALPHA);
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RenderSystem.setShaderColor(1.0F, 1.0F, 1.0F, alpha);
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float scale = MathHelper.lerp(a, 1.1f, 1.2f);
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float angle = MathHelper.lerp(a, -1f, 3f);
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matrices.translate(width / 2f, height / 2f, 0f);
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matrices.scale(scale, scale, 1f);
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matrices.multiply(Vec3f.POSITIVE_Z.getDegreesQuaternion(angle));
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drawTexture(
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matrices,
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(int) Math.floor(-overscan.getX()/2f - width/2f),
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(int) Math.floor(-overscan.getY()/2f - height/2f),
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width + (int) Math.ceil(overscan.getX()),
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height + (int) Math.ceil(overscan.getY()),
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0.0F,
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0.0F,
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1, 1, 1, 1
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);
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matrices.translate(width / 2f, height / 2f, 0f);
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matrices.pop();
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}
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public static void render(MatrixStack matrices, float delta, int width, int height) {
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t += delta;
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int index = (int) Math.floor(t / SLIDESHOW_IMAGE_LENGTH) % BACKGROUNDS.length;
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int previousIndex = (index - 1 + BACKGROUNDS.length) % BACKGROUNDS.length;
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float a = (t % SLIDESHOW_IMAGE_LENGTH) / SLIDESHOW_IMAGE_LENGTH;
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float transition = MathHelper.clamp(a / (TRANSITION_LENGTH / SLIDESHOW_IMAGE_LENGTH), 0f, 1f);
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if (transition < 1f) {
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renderBackground(matrices, a + 1f, previousIndex, 1f, width, height);
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}
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renderBackground(matrices, a, index, transition, width, height);
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}
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}
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