protected override void UseInternal(Matrix4x4 projView, MaterialUse use)
{
var program = GetProgram(use);
program.Use();
program.SetUniform("uTex", 0);
program.SetUniform("uProjectionViewMat", projView);
program.SetUniform("uTime", Globals.Time);
GL.ActiveTexture(TextureUnit.Texture0);
Texture.Use();
}
public override void Use(Matrix4x4 projView, MaterialUse use)
{
var program = GetProgram(use);
program.Use();
program.SetUniform("uDiffuseTex", 0);
program.SetUniform("uNormalTex", 1);
program.SetUniform("uProjectionViewMat", projView);
program.SetUniform("uModelMat", Matrix4x4.Identity);
GL.ActiveTexture(TextureUnit.Texture0);
Textures[0].Use();
GL.ActiveTexture(TextureUnit.Texture1);
Textures[1].Use();
}
protected Program GetProgram(MaterialUse use)
{
switch (use)
{
case MaterialUse.Static:
return(StaticProgram ?? (StaticProgram =
new Program(GenerateVertexShader(MaterialUse.Static), FragmentShader)));
case MaterialUse.Animated:
return(AnimatedProgram ?? (AnimatedProgram =
new Program(GenerateVertexShader(MaterialUse.Animated), FragmentShader)));
}
return(null);
}
public override void Use(Matrix4x4 projView, MaterialUse use)
{
var program = GetProgram(use);
program.Use();
program.SetUniform("uTex", 0);
program.SetUniform("uProjectionViewMat", projView);
program.SetUniform("uModelMat", Matrix4x4.Identity);
GL.ActiveTexture(TextureUnit.Texture0);
if (AnimationSpeed == 0)
{
Textures[0].Use();
}
else
{
Textures[(int)(Globals.Time / AnimationSpeed) % Textures.Length].Use();
}
}
string GenerateVertexShader(MaterialUse use)
{
switch (use)
{
case MaterialUse.Static: {
var ret = @"
#version 410
precision highp float;
layout (location = 0) in vec4 aPosition;
layout (location = 1) in vec3 aNormal;
layout (location = 2) in vec2 aTexCoord;
uniform mat4 uModelMat;
uniform mat4 uProjectionViewMat;
out vec2 vTexCoord;
out vec4 vPosition;
" ;
if (WantNormals)
{
ret += @"
out vec3 vNormal;
" ;
}
ret += @"
void main() {
gl_Position = vPosition = uProjectionViewMat * uModelMat * aPosition;
vTexCoord = aTexCoord;
" ;
if (WantNormals)
{
ret += @"
mat3 nmat = transpose(inverse(mat3(uModelMat)));
vNormal = normalize(nmat * aNormal);
" ;
}
ret += @"
}
" ;
return(ret);
}
case MaterialUse.Animated: {
var ret = @"
#version 410
precision highp float;
layout (location = 0) in vec4 aPosition1;
layout (location = 1) in vec3 aNormal1;
layout (location = 2) in vec2 aTexCoord1;
layout (location = 3) in vec4 aPosition2;
layout (location = 4) in vec3 aNormal2;
layout (location = 5) in vec2 aTexCoord2;
uniform mat4 uModelMat;
uniform mat4 uProjectionViewMat;
uniform float uInterp;
out vec2 vTexCoord;
out vec4 vPosition;
" ;
if (WantNormals)
{
ret += @"
out vec3 vNormal;
" ;
}
ret += @"
void main() {
gl_Position = vPosition = uProjectionViewMat * uModelMat * mix(aPosition1, aPosition2, uInterp);
vTexCoord = mix(aTexCoord1, aTexCoord2, uInterp);
" ;
if (WantNormals)
{
ret += @"
mat3 nmat = transpose(inverse(mat3(uModelMat)));
vNormal = normalize(nmat * mix(aNormal1, aNormal2, uInterp));
" ;
}
ret += @"
}
" ;
return(ret);
}
}
return(null);
}
protected Program GetProgram(MaterialUse use) => use switch
{
public abstract void Use(Matrix4x4 projView, MaterialUse use);