feat: block zapper overlay (#208)

Co-authored-by: Linnea Gräf <nea@nea.moe>

2 files changed, 81 insertions, 35 deletions

diff --git a/src/main/kotlin/util/render/CustomRenderLayers.kt b/src/main/kotlin/util/render/CustomRenderLayers.kt
index f713a81..2da1de7 100644
--- a/src/main/kotlin/util/render/CustomRenderLayers.kt
+++ b/src/main/kotlin/util/render/CustomRenderLayers.kt
@@ -88,6 +88,7 @@ object CustomRenderLayers {
 	val COLORED_QUADS = RenderLayer.of(
 		"firmament_quads",
 		RenderLayer.DEFAULT_BUFFER_SIZE,
+		false, true,
 		CustomRenderPipelines.COLORED_OMNIPRESENT_QUADS,
 		RenderLayer.MultiPhaseParameters.builder()
 			.lightmap(RenderPhase.DISABLE_LIGHTMAP)
diff --git a/src/main/kotlin/util/render/RenderInWorldContext.kt b/src/main/kotlin/util/render/RenderInWorldContext.kt
index 4963920..c30ee19 100644
--- a/src/main/kotlin/util/render/RenderInWorldContext.kt
+++ b/src/main/kotlin/util/render/RenderInWorldContext.kt
@@ -11,7 +11,6 @@ import net.minecraft.client.render.RenderLayer
 import net.minecraft.client.render.RenderTickCounter
 import net.minecraft.client.render.VertexConsumer
 import net.minecraft.client.render.VertexConsumerProvider
-import net.minecraft.client.render.VertexFormats
 import net.minecraft.client.texture.Sprite
 import net.minecraft.client.util.math.MatrixStack
 import net.minecraft.text.Text
@@ -20,7 +19,6 @@ import net.minecraft.util.math.BlockPos
 import net.minecraft.util.math.Vec3d
 import moe.nea.firmament.events.WorldRenderLastEvent
 import moe.nea.firmament.util.FirmFormatters
-import moe.nea.firmament.util.IntUtil.toRGBA
 import moe.nea.firmament.util.MC
 
 @RenderContextDSL
@@ -49,6 +47,38 @@ class RenderInWorldContext private constructor(
 		matrixStack.pop()
 	}
 
+	fun sharedVoxelSurface(blocks: Set<BlockPos>, color: Int) {
+		val m = BlockPos.Mutable()
+		val l = vertexConsumers.getBuffer(CustomRenderLayers.COLORED_QUADS)
+		blocks.forEach {
+			matrixStack.push()
+			matrixStack.translate(it.x.toFloat(), it.y.toFloat(), it.z.toFloat())
+			val p = matrixStack.peek().positionMatrix
+			m.set(it)
+			if (m.setX(it.x + 1) !in blocks) {
+				buildFaceXP(p, l, color)
+			}
+			if (m.setX(it.x - 1) !in blocks) {
+				buildFaceXN(p, l, color)
+			}
+			m.set(it)
+			if (m.setY(it.y + 1) !in blocks) {
+				buildFaceYP(p, l, color)
+			}
+			if (m.setY(it.y - 1) !in blocks) {
+				buildFaceYN(p, l, color)
+			}
+			m.set(it)
+			if (m.setZ(it.z + 1) !in blocks) {
+				buildFaceZP(p, l, color)
+			}
+			if (m.setZ(it.z - 1) !in blocks) {
+				buildFaceZN(p, l, color)
+			}
+			matrixStack.pop()
+		}
+	}
+
 	enum class VerticalAlign {
 		TOP, BOTTOM, CENTER;
 
@@ -205,41 +235,56 @@ class RenderInWorldContext private constructor(
 			}
 		}
 
-		private fun buildCube(matrix: Matrix4f, buf: VertexConsumer, colorInt: Int) {
-			val (r, g, b, a) = colorInt.toRGBA()
-
-			// Y-
-			buf.vertex(matrix, 0F, 0F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 0F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 0F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 0F, 0F).color(r, g, b, a)
-			// Y+
-			buf.vertex(matrix, 0F, 1F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 1F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 1F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 1F, 1F).color(r, g, b, a)
-			// X-
-			buf.vertex(matrix, 0F, 0F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 0F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 1F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 1F, 0F).color(r, g, b, a)
-			// X+
-			buf.vertex(matrix, 1F, 0F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 1F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 1F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 0F, 1F).color(r, g, b, a)
-			// Z-
-			buf.vertex(matrix, 0F, 0F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 0F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 1F, 0F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 1F, 0F).color(r, g, b, a)
-			// Z+
-			buf.vertex(matrix, 0F, 0F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 0F, 1F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 1F, 1F).color(r, g, b, a)
-			buf.vertex(matrix, 1F, 0F, 1F).color(r, g, b, a)
+		private fun buildFaceZP(matrix: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buf.vertex(matrix, 0F, 0F, 1F).color(rgba)
+			buf.vertex(matrix, 0F, 1F, 1F).color(rgba)
+			buf.vertex(matrix, 1F, 1F, 1F).color(rgba)
+			buf.vertex(matrix, 1F, 0F, 1F).color(rgba)
+		}
+
+		private fun buildFaceZN(matrix: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buf.vertex(matrix, 0F, 0F, 0F).color(rgba)
+			buf.vertex(matrix, 1F, 0F, 0F).color(rgba)
+			buf.vertex(matrix, 1F, 1F, 0F).color(rgba)
+			buf.vertex(matrix, 0F, 1F, 0F).color(rgba)
+		}
+
+		private fun buildFaceXP(matrix: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buf.vertex(matrix, 1F, 0F, 0F).color(rgba)
+			buf.vertex(matrix, 1F, 1F, 0F).color(rgba)
+			buf.vertex(matrix, 1F, 1F, 1F).color(rgba)
+			buf.vertex(matrix, 1F, 0F, 1F).color(rgba)
+		}
+
+		private fun buildFaceXN(matrix: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buf.vertex(matrix, 0F, 0F, 0F).color(rgba)
+			buf.vertex(matrix, 0F, 0F, 1F).color(rgba)
+			buf.vertex(matrix, 0F, 1F, 1F).color(rgba)
+			buf.vertex(matrix, 0F, 1F, 0F).color(rgba)
 		}
 
+		private fun buildFaceYN(matrix: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buf.vertex(matrix, 0F, 0F, 0F).color(rgba)
+			buf.vertex(matrix, 0F, 0F, 1F).color(rgba)
+			buf.vertex(matrix, 1F, 0F, 1F).color(rgba)
+			buf.vertex(matrix, 1F, 0F, 0F).color(rgba)
+		}
+
+		private fun buildFaceYP(matrix: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buf.vertex(matrix, 0F, 1F, 0F).color(rgba)
+			buf.vertex(matrix, 1F, 1F, 0F).color(rgba)
+			buf.vertex(matrix, 1F, 1F, 1F).color(rgba)
+			buf.vertex(matrix, 0F, 1F, 1F).color(rgba)
+		}
+
+		private fun buildCube(matrix4f: Matrix4f, buf: VertexConsumer, rgba: Int) {
+			buildFaceXP(matrix4f, buf, rgba)
+			buildFaceXN(matrix4f, buf, rgba)
+			buildFaceYP(matrix4f, buf, rgba)
+			buildFaceYN(matrix4f, buf, rgba)
+			buildFaceZP(matrix4f, buf, rgba)
+			buildFaceZN(matrix4f, buf, rgba)
+		}
 
 		fun renderInWorld(event: WorldRenderLastEvent, block: RenderInWorldContext. () -> Unit) {
 			// TODO: there should be *no more global state*. the only thing we should be doing is render layers. that includes settings like culling, blending, shader color, and depth testing