// MinecraftPT — Terrain Vertex Shader
// Handles terrain, block entities, damaged blocks

#include "/Lib/Settings.glsl"
#include "/Lib/Utilities.glsl"

out vec2 texcoord;
out vec3 worldPos;
out vec3 worldNormal;
out vec3 vertexNormal;
out vec4 color;
out vec2 lightmap;
flat out int blockId;
flat out float blockLightLevel;

#ifdef WAVING_PLANTS
#include "/Lib/IndividualFunctions/WavingPlants.glsl"
#endif

void main(){
	// World position
	vec4 viewPos = gl_ModelViewMatrix * gl_Vertex;
	vec4 wPos = gbufferModelViewInverse * viewPos;
	worldPos = wPos.xyz;

	// Normals
	vertexNormal = normalize(gl_NormalMatrix * gl_Normal);
	worldNormal = normalize(mat3(gbufferModelViewInverse) * vertexNormal);
	worldNormal = normalize(worldNormal);

	// Lightmap (blocklight, skylight)
	lightmap = gl_MultiTexCoord1.xy / 240.0;
	lightmap = saturate(lightmap);

	// Block ID from mc_Entity
	blockId = int(mc_Entity.x + 0.5);
	blockLightLevel = at_midBlock.w;

	// Waving plants
	#ifdef WAVING_PLANTS
		if (blockId == 4){
			WavingPlants(wPos, lightmap.y);
		}
	#endif

	texcoord = (gl_TextureMatrix[0] * gl_MultiTexCoord0).xy;
	color = gl_Color;

	gl_Position = gl_ProjectionMatrix * viewPos;
	gl_Position.xy += taaJitter * gl_Position.w;
}