68 lines
1.8 KiB
Kotlin
68 lines
1.8 KiB
Kotlin
package net.shadowfacts.cacao.util
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import com.mojang.blaze3d.platform.GlStateManager
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import net.minecraft.client.MinecraftClient
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import net.minecraft.client.gui.DrawableHelper
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import net.shadowfacts.cacao.geometry.Point
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import net.shadowfacts.cacao.geometry.Rect
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/**
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* Helper methods for rendering using Minecraft's utilities from Cacao views.
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* For unit testing, all drawing and OpenGL interaction can be disabled by setting the `cacao.drawing.disabled` JVM property to `true`.
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*
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* @author shadowfacts
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*/
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object RenderHelper {
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private val disabled = (System.getProperty("cacao.drawing.disabled") ?: "false").toBoolean()
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/**
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* Draws a solid [rect] filled with the given [color].
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*/
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fun fill(rect: Rect, color: Color) {
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if (disabled) return
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DrawableHelper.fill(rect.left.toInt(), rect.top.toInt(), rect.right.toInt(), rect.bottom.toInt(), color.argb)
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}
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/**
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* Draws the given [texture] filling the [rect].
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*/
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fun draw(rect: Rect, texture: Texture) {
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if (disabled) return
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color(1f, 1f, 1f, 1f)
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MinecraftClient.getInstance().textureManager.bindTexture(texture.location)
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val u = texture.u / texture.width.toFloat()
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val v = texture.v / texture.height.toFloat()
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DrawableHelper.blit(rect.left.toInt(), rect.top.toInt(), u, v, rect.width.toInt(), rect.height.toInt(), texture.width, texture.height)
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}
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/**
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* @see org.lwjgl.opengl.GL11.glPushMatrix
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*/
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fun pushMatrix() {
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if (disabled) return
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GlStateManager.pushMatrix()
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}
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/**
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* @see org.lwjgl.opengl.GL11.glPopMatrix
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*/
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fun popMatrix() {
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if (disabled) return
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GlStateManager.popMatrix()
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}
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/**
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* @see org.lwjgl.opengl.GL11.glTranslated
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*/
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fun translate(x: Double, y: Double, z: Double = 0.0) {
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if (disabled) return
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GlStateManager.translated(x, y, z)
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}
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fun color(r: Float, g: Float, b: Float, alpha: Float) {
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if (disabled) return
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GlStateManager.color4f(r, g, b, alpha)
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}
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} |