/**
* Set up a material for rendering. Activate its shader, and pass the material properties,
* textures, and light sources to the shader.
*
* @param m the material to be set up for rendering
*/
private void setMaterial(Material m) {
// Set up the shader for the material, if it has one
if (m != null && m.shader != null) {
// Identifier for shader variables
int id;
// Activate the shader
useShader(m.shader);
// Activate the diffuse texture, if the material has one
if (m.diffuseMap != null) {
// OpenGL calls to activate the texture
gl.glActiveTexture(GL3.GL_TEXTURE0); // Work with texture unit 0
gl.glEnable(GL3.GL_TEXTURE_2D);
gl.glBindTexture(GL3.GL_TEXTURE_2D, ((GLTexture) m.diffuseMap).getId());
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MAG_FILTER, GL3.GL_LINEAR);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MIN_FILTER, GL3.GL_LINEAR);
// We assume the texture in the shader is called "myTexture"
id = gl.glGetUniformLocation(activeShaderID, "myTexture");
gl.glUniform1i(
id,
0); // The variable in the shader needs to be set to the desired texture unit, i.e., 0
}
// Pass a default light source to shader
String lightString = "lightDirection[" + 0 + "]";
id = gl.glGetUniformLocation(activeShaderID, lightString);
if (id != -1) gl.glUniform4f(id, 0, 0, 1, 0.f); // Set light direction
else System.out.print("Could not get location of uniform variable " + lightString + "\n");
int nLights = 1;
// Iterate over all light sources in scene manager (overwriting the default light source)
Iterator<Light> iter = sceneManager.lightIterator();
Light l;
if (iter != null) {
nLights = 0;
while (iter.hasNext() && nLights < 8) {
l = iter.next();
// Pass light direction to shader, we assume the shader stores it in an array
// "lightDirection[]"
lightString = "lightDirection[" + nLights + "]";
id = gl.glGetUniformLocation(activeShaderID, lightString);
if (id != -1)
gl.glUniform4f(
id, l.direction.x, l.direction.y, l.direction.z, 0.f); // Set light direction
else System.out.print("Could not get location of uniform variable " + lightString + "\n");
nLights++;
}
// Pass number of lights to shader, we assume this is in a variable "nLights" in the shader
id = gl.glGetUniformLocation(activeShaderID, "nLights");
if (id != -1) gl.glUniform1i(id, nLights); // Set number of lightrs
// Only for debugging
// else
// System.out.print("Could not get location of uniform variable nLights\n");
}
}
}
/**
* Binds the BufferedImage byte-stream into video memory. BufferedImage must be in 4BYTE_ABGR.
* 4BYTE_ABGR removes endinese problems.
*/
public Texture bind(final BufferedImage _image, final InternalFormat _format) {
final GL3 gl = GLRenderer.getCanvas().getContext().getCurrentGL().getGL3();
if (gl == null) {
System.out.println("GL context doesn't exist");
return null;
}
gl.glEnable(GL.GL_TEXTURE_2D);
final int textureID = glGenTextures(gl);
gl.glBindTexture(GL3.GL_TEXTURE_2D, textureID);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_WRAP_S, GL3.GL_REPEAT);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_WRAP_T, GL3.GL_REPEAT);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MAG_FILTER, GL3.GL_LINEAR);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MIN_FILTER, GL3.GL_LINEAR_MIPMAP_LINEAR);
final int width = _image.getWidth();
final int height = _image.getHeight();
final int channels = _image.getSampleModel().getNumBands();
int internalFormat = GL3.GL_RGB;
if (gl.isExtensionAvailable("GL_EXT_abgr") == true) {
switch (channels) {
case 4:
imageFormat = GL2.GL_ABGR_EXT;
break;
case 3:
imageFormat = GL3.GL_BGR;
break;
case 1:
imageFormat = GL3.GL_RED;
break;
}
} else {
switch (channels) {
case 4:
imageFormat = GL3.GL_RGBA;
break;
case 3:
imageFormat = GL3.GL_RGB;
break;
case 1:
imageFormat = GL3.GL_RED;
break;
}
}
gl.glPixelStorei(GL3.GL_UNPACK_ALIGNMENT, 1);
gl.glTexImage2D(
GL3.GL_TEXTURE_2D,
0,
getGLInternalFormat(channels, _format),
width,
height,
0,
imageFormat,
GL3.GL_UNSIGNED_BYTE,
getByteBuffer(_image));
gl.glGenerateMipmap(GL3.GL_TEXTURE_2D);
gl.glBindTexture(GL.GL_TEXTURE_2D, 0); // Reset to default texture
return new Texture(new GLImage(textureID, width, height));
}
