add final glbook test

3 files changed, 44 insertions, 28 deletions

diff --git a/tests/glbook/CH13_ParticleSystem.png b/tests/glbook/CH13_ParticleSystem.png
new file mode 100644
index 00000000..39b9af0a
--- /dev/null
+++ b/tests/glbook/CH13_ParticleSystem.png
diff --git a/tests/glbook/Chapter_13/ParticleSystem/ParticleSystem.c b/tests/glbook/Chapter_13/ParticleSystem/ParticleSystem.c
index 378d05a7..f48e871a 100644
--- a/tests/glbook/Chapter_13/ParticleSystem/ParticleSystem.c
+++ b/tests/glbook/Chapter_13/ParticleSystem/ParticleSystem.c
@@ -17,9 +17,16 @@
 #include <math.h>

 #include "esUtil.h"

 

-#define NUM_PARTICLES	1000

+#define NUM_PARTICLES	2000

 #define PARTICLE_SIZE   7

 

+int randomTemp = 8765;

+float myrandom() {

+  int curr = randomTemp;

+  randomTemp = (1140671485 * randomTemp + 12820163) % 4294967296;

+  return ((float)curr) / 4294967296;

+}

+

 typedef struct

 {

    // Handle to a program object

@@ -40,11 +47,12 @@ typedef struct
    GLuint textureId;

 

    // Particle vertex data

-   float particleData[ NUM_PARTICLES * PARTICLE_SIZE ];

+   GLfloat particleData[ NUM_PARTICLES * PARTICLE_SIZE ];

 

    // Current time

    float time;

 

+  GLuint vertexObject;

 } UserData;

 

 ///

@@ -136,29 +144,31 @@ int Init ( ESContext *esContext )
    userData->colorLoc = glGetUniformLocation ( userData->programObject, "u_color" );

    userData->samplerLoc = glGetUniformLocation ( userData->programObject, "s_texture" );

 

-   glClearColor ( 0.0f, 0.0f, 0.0f, 0.0f );

+   glClearColor ( 0.0f, 0.0f, 0.0f, 1.0f );

 

    // Fill in particle data array

-   srand ( 0 );

    for ( i = 0; i < NUM_PARTICLES; i++ )

    {

-      float *particleData = &userData->particleData[i * PARTICLE_SIZE];

+      GLfloat *particleData = &userData->particleData[i * PARTICLE_SIZE];

    

       // Lifetime of particle

-      (*particleData++) = ( (float)(rand() % 10000) / 10000.0f );

+      (*particleData++) = myrandom();

 

       // End position of particle

-      (*particleData++) = ( (float)(rand() % 10000) / 5000.0f ) - 1.0f;

-      (*particleData++) = ( (float)(rand() % 10000) / 5000.0f ) - 1.0f;

-      (*particleData++) = ( (float)(rand() % 10000) / 5000.0f ) - 1.0f;

+      (*particleData++) = myrandom() * 2 - 1.0f;

+      (*particleData++) = myrandom() * 2 - 1.0f;

+      (*particleData++) = myrandom() * 2 - 1.0f;

 

       // Start position of particle

-      (*particleData++) = ( (float)(rand() % 10000) / 40000.0f ) - 0.125f;

-      (*particleData++) = ( (float)(rand() % 10000) / 40000.0f ) - 0.125f;

-      (*particleData++) = ( (float)(rand() % 10000) / 40000.0f ) - 0.125f;

-

+      (*particleData++) = myrandom() * 0.25 - 0.125f;

+      (*particleData++) = myrandom() * 0.25 - 0.125f;

+      (*particleData++) = myrandom() * 0.25 - 0.125f;

    }

 

+   glGenBuffers(1, &userData->vertexObject);

+   glBindBuffer( GL_ARRAY_BUFFER, userData->vertexObject );

+   glBufferData( GL_ARRAY_BUFFER, NUM_PARTICLES * PARTICLE_SIZE * 4, userData->particleData, GL_STATIC_DRAW );

+

    // Initialize time to cause reset on first update

    userData->time = 1.0f;

 

@@ -176,6 +186,7 @@ int Init ( ESContext *esContext )
 //

 void Update ( ESContext *esContext, float deltaTime )

 {

+//  deltaTime = 0.1;

    UserData *userData = esContext->userData;

   

    userData->time += deltaTime;

@@ -188,17 +199,17 @@ void Update ( ESContext *esContext, float deltaTime )
       userData->time = 0.0f;

 

       // Pick a new start location and color

-      centerPos[0] = ( (float)(rand() % 10000) / 10000.0f ) - 0.5f;

-      centerPos[1] = ( (float)(rand() % 10000) / 10000.0f ) - 0.5f;

-      centerPos[2] = ( (float)(rand() % 10000) / 10000.0f ) - 0.5f;

+      centerPos[0] = myrandom() - 0.5f;

+      centerPos[1] = myrandom() - 0.5f;

+      centerPos[2] = myrandom() - 0.5f;

       

       glUniform3fv ( userData->centerPositionLoc, 1, &centerPos[0] );

 

       // Random color

-      color[0] = ( (float)(rand() % 10000) / 20000.0f ) + 0.5f;

-      color[1] = ( (float)(rand() % 10000) / 20000.0f ) + 0.5f;

-      color[2] = ( (float)(rand() % 10000) / 20000.0f ) + 0.5f;

-      color[3] = 0.5;

+      color[0] = myrandom() * 0.5 + 0.5f;

+      color[1] = myrandom() * 0.5 + 0.5f;

+      color[2] = myrandom() * 0.5 + 0.5f;

+      color[3] = 1.0;

 

       glUniform4fv ( userData->colorLoc, 1, &color[0] );

    }

@@ -224,17 +235,18 @@ void Draw ( ESContext *esContext )
    glUseProgram ( userData->programObject );

 

    // Load the vertex attributes

+   glBindBuffer( GL_ARRAY_BUFFER, userData->vertexObject );

    glVertexAttribPointer ( userData->lifetimeLoc, 1, GL_FLOAT, 

                            GL_FALSE, PARTICLE_SIZE * sizeof(GLfloat), 

-                           userData->particleData );

+                           0 );

    

    glVertexAttribPointer ( userData->endPositionLoc, 3, GL_FLOAT,

                            GL_FALSE, PARTICLE_SIZE * sizeof(GLfloat),

-                           &userData->particleData[1] );

+                           4 );

 

    glVertexAttribPointer ( userData->startPositionLoc, 3, GL_FLOAT,

                            GL_FALSE, PARTICLE_SIZE * sizeof(GLfloat),

-                           &userData->particleData[4] );

+                           4 * 4 );

 

    

    glEnableVertexAttribArray ( userData->lifetimeLoc );

@@ -247,11 +259,13 @@ void Draw ( ESContext *esContext )
    // Bind the texture

    glActiveTexture ( GL_TEXTURE0 );

    glBindTexture ( GL_TEXTURE_2D, userData->textureId );

-   glEnable ( GL_TEXTURE_2D );

+   //glEnable ( GL_TEXTURE_2D );

 

    // Set the sampler texture unit to 0

    glUniform1i ( userData->samplerLoc, 0 );

 

+   Update ( esContext, 133 * 0.001125 );

+

    glDrawArrays( GL_POINTS, 0, NUM_PARTICLES );

    

    eglSwapBuffers ( esContext->eglDisplay, esContext->eglSurface );

@@ -280,15 +294,17 @@ int main ( int argc, char *argv[] )
    esInitContext ( &esContext );

    esContext.userData = &userData;

 

-   esCreateWindow ( &esContext, "ParticleSystem", 640, 480, ES_WINDOW_RGB );

+   esCreateWindow ( &esContext, "ParticleSystem", 320, 240, ES_WINDOW_RGB );

    

    if ( !Init ( &esContext ) )

       return 0;

 

    esRegisterDrawFunc ( &esContext, Draw );

-   esRegisterUpdateFunc ( &esContext, Update );

+//   esRegisterUpdateFunc ( &esContext, Update );

    

-   esMainLoop ( &esContext );

+   Draw (&esContext);

+  Draw (&esContext);

+  //esMainLoop ( &esContext );

 

    ShutDown ( &esContext );

 }

diff --git a/tests/glbook/Makefile b/tests/glbook/Makefile
index cd5f8aee..62cffedf 100644
--- a/tests/glbook/Makefile
+++ b/tests/glbook/Makefile
@@ -29,9 +29,9 @@ all: ./Chapter_2/Hello_Triangle/CH02_HelloTriangle.bc \
      ./Chapter_9/Simple_TextureCubemap/CH09_TextureCubemap.bc \
      ./Chapter_9/TextureWrap/CH09_TextureWrap.bc \
      ./Chapter_10/MultiTexture/CH10_MultiTexture.bc \
+     ./Chapter_13/ParticleSystem/CH13_ParticleSystem.bc
 #     ./Chapter_11/Multisample/CH11_Multisample.bc \
 #     ./Chapter_11/Stencil_Test/CH11_Stencil_Test.bc \
-#     ./Chapter_13/ParticleSystem/CH13_ParticleSystem.bc
 
 clean:
 	find . -name "CH??_*" | xargs rm -f