public void createShader(Shader shader) {
this.shader = shader;
glActiveTexture(GL_TEXTURE1);
shader.bind();
int uniform = glGetUniformLocation(shader.getID(), "texture");
glUniform1i(uniform, 1);
glActiveTexture(GL_TEXTURE2);
uniform = glGetUniformLocation(shader.getID(), "extraTexture");
glUniform1i(uniform, 2);
shader.release();
}
protected void compile() {
vao = glGenVertexArrays();
glBindVertexArray(vao);
{
vbo = glGenBuffers();
glBindBuffer(GL_ARRAY_BUFFER, vbo);
{
glBufferData(GL_ARRAY_BUFFER, Buffer.createFloatBuffer(vertices), GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, false, 0, 0);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
vio = glGenBuffers();
glBindBuffer(GL_ARRAY_BUFFER, vio);
{
glBufferData(GL_ARRAY_BUFFER, Buffer.createByteBuffer(indices), GL_STATIC_DRAW);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
vto = glGenBuffers();
glBindBuffer(GL_ARRAY_BUFFER, vto);
{
glBufferData(GL_ARRAY_BUFFER, Buffer.createByteBuffer(texCoords), GL_STATIC_DRAW);
glVertexAttribPointer(1, 3, GL_UNSIGNED_BYTE, false, 0, 1);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
glBindVertexArray(0);
glActiveTexture(GL_TEXTURE1);
shader.bind();
int uniform = glGetUniformLocation(shader.getID(), "texture");
glUniform1i(uniform, 1);
shader.release();
}
@Override
public void prepare(Object texObj, float alpha, int fbufWidth, int fbufHeight) {
ctx.checkGLError("textureShader.prepare start");
boolean wasntAlreadyActive = super.prepare(fbufWidth, fbufHeight);
if (wasntAlreadyActive) {
glActiveTexture(GL_TEXTURE0);
glUniform1i(uTexture, 0);
}
int tex = (Integer) texObj;
if (wasntAlreadyActive || tex != lastTex || alpha != lastAlpha) {
flush();
glUniform1f(uAlpha, alpha);
lastAlpha = alpha;
lastTex = tex;
ctx.checkGLError("textureShader.prepare end");
}
}
/**
* Method called by the World Class to render the Tile.
*
* @param x : location to where the Tile is going to be rendered.
* @param y : location to where the Tile is going to be rendered.
* @param w : instance of the World Class
* @param ent : List of entities that emit light.
*/
public void render(int x, int y, World w, ArrayList<Entity> ent) {
// Binding the Uniforms to make the light effects.
bindUniforms(w, ent);
// Setting up OpenGL for render
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ZERO);
// Updating the Tile coordinates.
this.x = x;
this.y = y;
glTranslatef(x, y, 0);
// Activating and Binding the Tile Texture.
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, this.tex);
// Sending the texture to the shader.
glUniform1i(glGetUniformLocation(shade.getShader(), "texture"), 0);
// Drawing the QUAD.
glBegin(GL_QUADS);
{
glTexCoord2f(0, 0);
glVertex2f(0, 0);
glTexCoord2f(0, 1);
glVertex2f(0, this.height);
glTexCoord2f(1, 1);
glVertex2f(this.width, this.height);
glTexCoord2f(1, 0);
glVertex2f(this.width, 0);
}
glEnd();
// Releasing the Texture.
glBindTexture(GL_TEXTURE_2D, 0);
// Getting the location back to the inicial coordinates.
glTranslatef(-x, -y, 0);
// Disabling BLEND and releasing shader for next render.
glDisable(GL_BLEND);
shade.release();
glClear(GL_STENCIL_BUFFER_BIT);
}
