attribute vec3 position;
attribute vec2 uv;
  
varying vec2 uv0Varying;
varying vec2 uv1Varying;

uniform vec4 uvBounds0;
uniform vec4 uvBounds1;
 
uniform mat4 agk_World;
uniform mat4 agk_ViewProj;
 
void main()
{
	vec4 pos = agk_World * vec4(position,1);
	gl_Position = agk_ViewProj * pos;
	uv0Varying = uv * uvBounds0.xy + uvBounds0.zw;
	uv1Varying = uv * uvBounds1.xy + uvBounds1.zw;
}

// constant values sent through from AGK code.
uniform sampler2D texture0; 
uniform sampler2D texture1; 
 
// Anything that the vertex shader passes as output needs to 
// be defined here as input. The vertex shader is passing the 
// texture coordinate, so it is defined again here.
varying vec2 uv0Varying;
varying vec2 uv1Varying;
 
void main()
{
	vec4 colorResult0  = texture2D(texture0, uv0Varying);
	vec4 colorResult1  = texture2D(texture1, uv1Varying); // you can change here the second uvlayer by texture2D(texture1, texCoord1) if you use different uvchanel for each texture

	gl_FragColor = mix(colorResult0, colorResult1, colorResult1.a); // mix with the alpha of the second texture. You can mix with a third texture if you want to use seamless texture and repeat it.
}

// create a sphere to see the texture
CreateObjectBox(1,20,20,20)
 
// position and orientate the camera
SetCameraPosition(1,0,100,-200)
SetCameraLookAt(1,0,0,0,0)
SetGenerateMipmaps(1)
 
LoadImage(1,"texture0.jpg") // no need for alpha with this one
LoadImage(2,"texture1.png") // with alpha ;)

CreatePointLight(1,-5,5,5,500,200,200,200)
 
// initial rotation values
angle_x# = 0.0
 
// main loop
SetObjectRotation(1,-60,-60,0.0)
SetObjectScale(1,4,2,2)
LoadShader(3, "blend.vs", "blend.ps")
SetObjectShader(1,3)
SetObjectImage(1,1,0)
SetObjectImage(1,2,1)
SetObjectUVScale(1,1,2.0,2.0)
SetObjectUVOffset(1,1,-0.25,-0.25)
 
do
     
    angle_x# = angle_x# + 1 
    SetObjectRotation(1,0, angle_x#,0.0)
    sync()
 
loop

attribute vec3 position;
attribute vec2 uv;
  
varying vec2 uv0Varying;
varying vec2 uv1Varying;

uniform vec4 uvBounds0;
uniform vec4 uvBounds1;
uniform float uvAngle;
 
uniform mat4 agk_World;
uniform mat4 agk_ViewProj;
 
void main()
{
	vec4 pos = agk_World * vec4(position,1);
	gl_Position = agk_ViewProj * pos;
	uv0Varying = uv * uvBounds0.xy + uvBounds0.zw;
	
	vec2 uvRotate = uv * uvBounds1.xy + uvBounds1.zw;
	float sinAngle = sin(uvAngle);
	float cosAngle = cos(uvAngle);
	uvRotate = (uvRotate - 0.5) * mat2(cosAngle, sinAngle, -sinAngle, cosAngle);
	uvRotate += 0.5;
	uv1Varying = uvRotate;
}