src/libprojectM/Renderer/Renderable.cpp

#include "Common.hpp"

#ifdef USE_GLES1
#include <GLES/gl.h>
#else
#ifdef __APPLE__
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#else
#include <GL/gl.h>
#include <GL/glu.h>
#endif
#endif

#include "Renderable.hpp"
#include <math.h>

typedef float floatPair[2];
typedef float floatTriple[3];
typedef float floatQuad[4];

RenderContext::RenderContext()
	: time(0),texsize(512), aspectRatio(1), aspectCorrect(false){};

RenderItem::RenderItem():masterAlpha(1){}

DarkenCenter::DarkenCenter():RenderItem(){}
MotionVectors::MotionVectors():RenderItem(){}
Border::Border():RenderItem(){}

void DarkenCenter::Draw(RenderContext &context)
	{
		//float unit=0.05f;

		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

		float colors[6][4] = {{0, 0, 0, (3.0f/32.0f) * masterAlpha},
				      {0, 0, 0, 0},
				      {0, 0, 0, 0},
				      {0, 0, 0, 0},
				      {0, 0, 0, 0},
				      {0, 0, 0, 0}};

		float points[6][2] = {{ 0.5,  0.5},
				      { 0.45, 0.5},
				      { 0.5,  0.45},
				      { 0.55, 0.5},
				      { 0.5,  0.55},
				      { 0.45, 0.5}};

		glEnableClientState(GL_VERTEX_ARRAY);
		glEnableClientState(GL_COLOR_ARRAY);
		glDisableClientState(GL_TEXTURE_COORD_ARRAY);

		glVertexPointer(2,GL_FLOAT,0,points);
		glColorPointer(4,GL_FLOAT,0,colors);

		glDrawArrays(GL_TRIANGLE_FAN,0,6);

	}

Shape::Shape():RenderItem()
{
	 std::string imageUrl = "";
	     sides = 4;
	     thickOutline = false;
	     enabled = true;
	     additive = false;
	     textured = false;

	     tex_zoom = 1.0;
	     tex_ang = 0.0;

	     x = 0.5;
	     y = 0.5;
	     radius = 1.0;
	     ang = 0.0;

	     r = 0.0; /* red color value */
	     g = 0.0; /* green color value */
	     b = 0.0; /* blue color value */
	     a = 0.0; /* alpha color value */

	     r2 = 0.0; /* red color value */
	     g2 = 0.0; /* green color value */
	     b2 = 0.0; /* blue color value */
	     a2 = 0.0; /* alpha color value */

	     border_r = 0.0; /* red color value */
	     border_g = 0.0; /* green color value */
	     border_b = 0.0; /* blue color value */
	     border_a = 0.0; /* alpha color value */


}

void Shape::Draw(RenderContext &context)
{

	float xval, yval;
	float t;

			// printf("drawing shape %f\n", ang);

			float temp_radius= radius*(.707*.707*.707*1.04);
			//Additive Drawing or Overwrite
			if ( additive==0)  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
			else    glBlendFunc(GL_SRC_ALPHA, GL_ONE);

			xval= x;
			yval= -(y-1);

			if ( textured)
			{
				if (imageUrl !="")
				{
					GLuint tex= context.textureManager->getTexture(imageUrl);
					if (tex != 0)
					{
						glBindTexture(GL_TEXTURE_2D, tex);
						context.aspectRatio=1.0;
					}
				}

				glMatrixMode(GL_TEXTURE);
				glPushMatrix();
				glLoadIdentity();

				glEnable(GL_TEXTURE_2D);

				glEnableClientState(GL_VERTEX_ARRAY);
				glEnableClientState(GL_COLOR_ARRAY);
				glEnableClientState(GL_TEXTURE_COORD_ARRAY);

				floatQuad *colors = new float[sides+2][4];
				floatPair *tex = new float[sides+2][2];
				floatPair *points = new float[sides+2][2];

				//Define the center point of the shape
				colors[0][0] = r;
				colors[0][1] = g;
				colors[0][2] = b;
				colors[0][3] = a * masterAlpha;
			  	   tex[0][0] = 0.5;
				   tex[0][1] = 0.5;
				points[0][0] = xval;
				points[0][1] = yval;

				for ( int i=1;i< sides+2;i++)
				{
				  colors[i][0]= r2;
				  colors[i][1]=g2;
				  colors[i][2]=b2;
				  colors[i][3]=a2 * masterAlpha;

				  t = (i-1)/(float) sides;
				  tex[i][0] =0.5f + 0.5f*cosf(t*3.1415927f*2 +  tex_ang + 3.1415927f*0.25f)*(context.aspectCorrect ? context.aspectRatio : 1.0)/ tex_zoom;
				  tex[i][1] =  0.5f + 0.5f*sinf(t*3.1415927f*2 +  tex_ang + 3.1415927f*0.25f)/ tex_zoom;
				  points[i][0]=temp_radius*cosf(t*3.1415927f*2 +  ang + 3.1415927f*0.25f)*(context.aspectCorrect ? context.aspectRatio : 1.0)+xval;
				  points[i][1]=temp_radius*sinf(t*3.1415927f*2 +  ang + 3.1415927f*0.25f)+yval;


				}

				glVertexPointer(2,GL_FLOAT,0,points);
				glColorPointer(4,GL_FLOAT,0,colors);
				glTexCoordPointer(2,GL_FLOAT,0,tex);

				glDrawArrays(GL_TRIANGLE_FAN,0,sides+2);

				glDisable(GL_TEXTURE_2D);
				glPopMatrix();
				glMatrixMode(GL_MODELVIEW);

				//Reset Texture state since we might have changed it
/*
				if(this->renderTarget->useFBO)
				{
					glBindTexture( GL_TEXTURE_2D, renderTarget->textureID[1] );
				}
				else
				{
					glBindTexture( GL_TEXTURE_2D, renderTarget->textureID[0] );
				}
*/

				delete[] colors;
				delete[] tex;
				delete[] points;							
			}
			else
			{//Untextured (use color values)


			  glEnableClientState(GL_VERTEX_ARRAY);
			  glEnableClientState(GL_COLOR_ARRAY);
			  glDisableClientState(GL_TEXTURE_COORD_ARRAY);

			  floatQuad *colors = new float[sides+2][4];
			  floatPair *points = new float[sides+2][2];

			  //Define the center point of the shape
			  colors[0][0]=r;
			  colors[0][1]=g;
			  colors[0][2]=b;
			  colors[0][3]=a * masterAlpha;
			  points[0][0]=xval;
			  points[0][1]=yval;



			  for ( int i=1;i< sides+2;i++)
			    {
			      colors[i][0]=r2;
			      colors[i][1]=g2;
			      colors[i][2]=b2;
			      colors[i][3]=a2 * masterAlpha;
			      t = (i-1)/(float) sides;
			      points[i][0]=temp_radius*cosf(t*3.1415927f*2 +  ang + 3.1415927f*0.25f)*(context.aspectCorrect ? context.aspectRatio : 1.0)+xval;
			      points[i][1]=temp_radius*sinf(t*3.1415927f*2 +  ang + 3.1415927f*0.25f)+yval;

			    }

			  glVertexPointer(2,GL_FLOAT,0,points);
			  glColorPointer(4,GL_FLOAT,0,colors);


			  glDrawArrays(GL_TRIANGLE_FAN,0,sides+2);
			  //draw first n-1 triangular pieces

			  delete[] colors;
			  delete[] points;
			}
			if (thickOutline==1)  glLineWidth(context.texsize < 512 ? 1 : 2*context.texsize/512);

			glEnableClientState(GL_VERTEX_ARRAY);
			glDisableClientState(GL_COLOR_ARRAY);

			floatPair *points = new float[sides+1][2];

			glColor4f( border_r, border_g, border_b, border_a * masterAlpha);

			for ( int i=0;i< sides;i++)
			{
				t = (i-1)/(float) sides;
				points[i][0]= temp_radius*cosf(t*3.1415927f*2 +  ang + 3.1415927f*0.25f)*(context.aspectCorrect ? context.aspectRatio : 1.0)+xval;
				points[i][1]=  temp_radius*sinf(t*3.1415927f*2 +  ang + 3.1415927f*0.25f)+yval;

			}

			glVertexPointer(2,GL_FLOAT,0,points);
			glDrawArrays(GL_LINE_LOOP,0,sides);

			if (thickOutline==1)  glLineWidth(context.texsize < 512 ? 1 : context.texsize/512);

			delete[] points;


}

void MotionVectors::Draw(RenderContext &context)
{
	glEnableClientState(GL_VERTEX_ARRAY);
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	glDisableClientState(GL_COLOR_ARRAY);

	float  intervalx=1.0/x_num;
	float  intervaly=1.0/y_num;

	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	glPointSize(length);
	glColor4f(r, g, b, a * masterAlpha);

	if (x_num + y_num < 600)
	  {
	int size = x_num * y_num ;

	floatPair *points = new float[size][2];

	for (int x=0;x<(int)x_num;x++)
	{
		for(int y=0;y<(int)y_num;y++)
		{
			float lx, ly, lz;
			lx = x_offset+x*intervalx;
			ly = y_offset+y*intervaly;

			points[(x * (int)y_num) + y][0] = lx;
			points[(x * (int)y_num) + y][1] = ly;
		}
	}

	glVertexPointer(2,GL_FLOAT,0,points);
	glDrawArrays(GL_POINTS,0,size);

	delete[] points;
	  }
}

void Border::Draw(RenderContext &context)
{
	glEnableClientState(GL_VERTEX_ARRAY);
	glDisableClientState(GL_COLOR_ARRAY);
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	//Draw Borders
	float of=outer_size*.5;
	float iff=inner_size*.5;
	float texof=1.0-of;

	//no additive drawing for borders
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glColor4f(outer_r, outer_g, outer_b, outer_a * masterAlpha);

	float pointsA[4][2] = {{0,0},{0,1},{of,0},{of,1}};
	glVertexPointer(2,GL_FLOAT,0,pointsA);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	float pointsB[4][2] = {{of,0},{of,of},{texof,0},{texof,of}};
	glVertexPointer(2,GL_FLOAT,0,pointsB);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	float pointsC[4][2] = {{texof,0},{texof,1},{1,0},{1,1}};
	glVertexPointer(2,GL_FLOAT,0,pointsC);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	float pointsD[4][2] = {{of,1},{of,texof},{texof,1},{texof,texof}};
	glVertexPointer(2,GL_FLOAT,0,pointsD);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	glColor4f(inner_r, inner_g, inner_b, inner_a * masterAlpha);

	glRectd(of, of, of+iff, texof);
	glRectd(of+iff, of, texof-iff, of+iff);
	glRectd(texof-iff, of, texof, texof);
	glRectd(of+iff, texof, texof-iff, texof-iff);

	float pointsE[4][2] = {{of,of},{of,texof},{of+iff,of},{of+iff,texof}};
	glVertexPointer(2,GL_FLOAT,0,pointsE);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	float pointsF[4][2] = {{of+iff,of},{of+iff,of+iff},{texof-iff,of},{texof-iff,of+iff}};
	glVertexPointer(2,GL_FLOAT,0,pointsF);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	float pointsG[4][2] = {{texof-iff,of},{texof-iff,texof},{texof,of},{texof,texof}};
	glVertexPointer(2,GL_FLOAT,0,pointsG);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

	float pointsH[4][2] = {{of+iff,texof},{of+iff,texof-iff},{texof-iff,texof},{texof-iff,texof-iff}};
	glVertexPointer(2,GL_FLOAT,0,pointsH);
	glDrawArrays(GL_TRIANGLE_STRIP,0,4);

}