Fairy souls

1 files changed, 91 insertions, 0 deletions

diff --git a/src/main/kotlin/moe/nea/notenoughupdates/util/render/block.kt b/src/main/kotlin/moe/nea/notenoughupdates/util/render/block.kt
new file mode 100644
index 0000000..9b5432a
--- /dev/null
+++ b/src/main/kotlin/moe/nea/notenoughupdates/util/render/block.kt
@@ -0,0 +1,91 @@
+package moe.nea.notenoughupdates.util.render
+
+import com.mojang.blaze3d.systems.RenderSystem
+import net.minecraft.client.gl.VertexBuffer
+import net.minecraft.client.render.BufferBuilder
+import net.minecraft.client.render.Camera
+import net.minecraft.client.render.GameRenderer
+import net.minecraft.client.render.Tessellator
+import net.minecraft.client.render.VertexFormat
+import net.minecraft.client.render.VertexFormats
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Vec3d
+
+class RenderBlockContext(val tesselator: Tessellator, val camPos: Vec3d) {
+    val buffer = tesselator.buffer
+    fun color(red: Float, green: Float, blue: Float, alpha: Float) {
+        RenderSystem.setShaderColor(red, green, blue, alpha)
+    }
+
+    fun block(blockPos: BlockPos) {
+        val matrixStack = RenderSystem.getModelViewStack()
+        matrixStack.push()
+        matrixStack.translate(blockPos.x - camPos.x, blockPos.y - camPos.y, blockPos.z - camPos.z)
+        RenderSystem.applyModelViewMatrix()
+        RenderSystem.setShader(GameRenderer::getPositionColorShader)
+        buildCube(buffer)
+        tesselator.draw()
+        matrixStack.pop()
+    }
+
+    companion object {
+        fun buildCube(buf: BufferBuilder) {
+            buf.begin(VertexFormat.DrawMode.TRIANGLES, VertexFormats.POSITION_COLOR)
+            buf.fixedColor(255, 255, 255, 255)
+            buf.vertex(0.0, 0.0, 0.0).next()
+            buf.vertex(0.0, 0.0, 1.0).next()
+            buf.vertex(0.0, 1.0, 1.0).next()
+            buf.vertex(1.0, 1.0, 0.0).next()
+            buf.vertex(0.0, 0.0, 0.0).next()
+            buf.vertex(0.0, 1.0, 0.0).next()
+            buf.vertex(1.0, 0.0, 1.0).next()
+            buf.vertex(0.0, 0.0, 0.0).next()
+            buf.vertex(1.0, 0.0, 0.0).next()
+            buf.vertex(1.0, 1.0, 0.0).next()
+            buf.vertex(1.0, 0.0, 0.0).next()
+            buf.vertex(0.0, 0.0, 0.0).next()
+            buf.vertex(0.0, 0.0, 0.0).next()
+            buf.vertex(0.0, 1.0, 1.0).next()
+            buf.vertex(0.0, 1.0, 0.0).next()
+            buf.vertex(1.0, 0.0, 1.0).next()
+            buf.vertex(0.0, 0.0, 1.0).next()
+            buf.vertex(0.0, 0.0, 0.0).next()
+            buf.vertex(0.0, 1.0, 1.0).next()
+            buf.vertex(0.0, 0.0, 1.0).next()
+            buf.vertex(1.0, 0.0, 1.0).next()
+            buf.vertex(1.0, 1.0, 1.0).next()
+            buf.vertex(1.0, 0.0, 0.0).next()
+            buf.vertex(1.0, 1.0, 0.0).next()
+            buf.vertex(1.0, 0.0, 0.0).next()
+            buf.vertex(1.0, 1.0, 1.0).next()
+            buf.vertex(1.0, 0.0, 1.0).next()
+            buf.vertex(1.0, 1.0, 1.0).next()
+            buf.vertex(1.0, 1.0, 0.0).next()
+            buf.vertex(0.0, 1.0, 0.0).next()
+            buf.vertex(1.0, 1.0, 1.0).next()
+            buf.vertex(0.0, 1.0, 0.0).next()
+            buf.vertex(0.0, 1.0, 1.0).next()
+            buf.vertex(1.0, 1.0, 1.0).next()
+            buf.vertex(0.0, 1.0, 1.0).next()
+            buf.vertex(1.0, 0.0, 1.0).next()
+            buf.unfixColor()
+        }
+
+        fun renderBlocks(camera: Camera, block: RenderBlockContext. () -> Unit) {
+            RenderSystem.disableDepthTest()
+            RenderSystem.disableTexture()
+            RenderSystem.enableBlend()
+            RenderSystem.defaultBlendFunc()
+
+            val ctx = RenderBlockContext(Tessellator.getInstance(), camera.pos)
+            block(ctx)
+
+            VertexBuffer.unbind()
+            RenderSystem.enableDepthTest()
+            RenderSystem.enableTexture()
+            RenderSystem.disableBlend()
+        }
+    }
+}
+
+