CUPYAY

Models/Models.vcxproj

@@ -147,7 +147,9 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="fragShader.glsl" />
+    <None Include="fragShader2.glsl" />
     <None Include="vertShader.glsl" />
+    <None Include="vertShader2.glsl" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="ShaderError.h" />

Models/Models.vcxproj.filters

@@ -26,6 +26,12 @@
     <None Include="vertShader.glsl">
       <Filter>Resource Files</Filter>
     </None>
+    <None Include="vertShader2.glsl">
+      <Filter>Resource Files</Filter>
+    </None>
+    <None Include="fragShader2.glsl">
+      <Filter>Resource Files</Filter>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="ShaderError.h">

Models/fragShader2.glsl

@@ -0,0 +1,11 @@
+#version 430
+layout (binding=0) uniform sampler2D samp;
+out vec4 color;
+in vec2 uv;
+void main(void)
+{
+	color=texture(samp,uv);
+	if(color.a<0.1){
+		discard;
+	}
+}

Models/main.cpp

@@ -10,19 +10,26 @@
 #include <stack>
 
 #define numVAOs 1
-#define numVBOs 2
+#define numVBOs 3
 
-GLuint renderingProgram;
+GLuint renderingProgram,expandingPlaneProgram;
 GLuint vao[numVAOs];
 GLuint vbo[numVBOs];
 
 glm::vec3 camera;
-GLuint mvLoc,projLoc;
+GLuint vLoc,projLoc;
 int width, height;
 float aspect;
 glm::mat4 mMat, pMat, vMat, mvMat;
 std::stack<glm::mat4>transforms;
 
+GLuint cupYayTex;
+
+void setupTextures(void){
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D,cupYayTex);
+}
+
 void setupVertices(void) { // 36 vertices, 12 triangles, makes 2x2x2 cube placed at origin
    float cubePositions[108] = {
       -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f,
@@ -46,6 +53,14 @@ void setupVertices(void) { // 36 vertices, 12 triangles, makes 2x2x2 cube placed
         -1.0f, -1.0f, - 1.0f, 1.0f, - 1.0f, 1.0f, -1.0f, -1.0f, 1.0f,
         1.0f, -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f
    };
+   float plane[6*3]={
+        -1,1,0,1,1,0,-1,-1,0,
+        -1,-1,0,1,1,0,1,-1,0
+   };
+   float planeUVs[6*2]={
+        0,1,1,1,0,0,
+        0,0,1,1,1,0
+   };
    glGenVertexArrays(1, vao);
    glBindVertexArray(vao[0]);
    glGenBuffers(numVBOs, vbo);
@@ -54,32 +69,43 @@ void setupVertices(void) { // 36 vertices, 12 triangles, makes 2x2x2 cube placed
    glBufferData(GL_ARRAY_BUFFER, sizeof(cubePositions), cubePositions, GL_STATIC_DRAW);
 
    glBindBuffer(GL_ARRAY_BUFFER, vbo[1]);
-   glBufferData(GL_ARRAY_BUFFER, sizeof(pyramidPositions), pyramidPositions, GL_STATIC_DRAW);
+   glBufferData(GL_ARRAY_BUFFER, sizeof(plane), plane, GL_STATIC_DRAW);
+   glBindBuffer(GL_ARRAY_BUFFER, vbo[2]);
+   glBufferData(GL_ARRAY_BUFFER, sizeof(planeUVs), planeUVs, GL_STATIC_DRAW);
 }
 
 void init(GLFWwindow* window) {
     renderingProgram=utils::createShaderProgram("vertShader.glsl","fragShader.glsl");
-    camera={0.0f,0.0f,-12.0f};
+    expandingPlaneProgram=utils::createShaderProgram("vertShader2.glsl","fragShader2.glsl");
+    camera={0.0f,0.0f,-10.0f};
     setupVertices();
+
+    cupYayTex=utils::loadTexture("cupyay4.png");
+    setupTextures();
 }
 
 double lastTime=0;
 
 void DrawCube(){
-    glUniformMatrix4fv(mvLoc,1,GL_FALSE,glm::value_ptr(mMat));
+    glUniformMatrix4fv(vLoc,1,GL_FALSE,glm::value_ptr(mMat));
     glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat));
     glBindBuffer(GL_ARRAY_BUFFER,vbo[0]);
     glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0);
     glDrawArrays(GL_TRIANGLES,0,36);
 }
 void DrawSquarePyramid(){
-    glUniformMatrix4fv(mvLoc,1,GL_FALSE,glm::value_ptr(mMat));
+    glUniformMatrix4fv(vLoc,1,GL_FALSE,glm::value_ptr(mMat));
     glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat));
     glBindBuffer(GL_ARRAY_BUFFER,vbo[1]);
     glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0);
     glDrawArrays(GL_TRIANGLES,0,18);
 }
 
+GLuint timeLoc;
+
+GLuint mvLoc;
+float size=0;
+
 void display(GLFWwindow* window, double currentTime) {
     double elapsedTime=currentTime-lastTime;
     lastTime=currentTime;
@@ -92,9 +118,11 @@ void display(GLFWwindow* window, double currentTime) {
     glEnable(GL_DEPTH_TEST);
     glDepthFunc(GL_LEQUAL);
     glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
 
-    mvLoc=glGetUniformLocation(renderingProgram,"mv_matrix");
+    vLoc=glGetUniformLocation(renderingProgram,"v_matrix");
     projLoc=glGetUniformLocation(renderingProgram,"proj_matrix");
+    timeLoc=glGetUniformLocation(renderingProgram,"time");
 
     glfwGetFramebufferSize(window,&width,&height);
     aspect=(float)width/(float)height;
@@ -104,34 +132,45 @@ void display(GLFWwindow* window, double currentTime) {
     transforms.push(vMat);
     
     mMat=glm::translate(transforms.top(),{0.f,0.f,0.f});
-    transforms.push(mMat);
-    mMat=glm::rotate(mMat,float(utils::degToRad(90)*currentTime),{0.f,1.f,0.f});
-    mMat=glm::rotate(mMat,float(utils::degToRad(12)),{0.f,0.f,1.f});
-    DrawSquarePyramid();
-    mMat=glm::translate(transforms.top(),{0.f,0.f,0.f});
-    mMat=glm::rotate(mMat,float(utils::degToRad(90)*currentTime),{0.f,1.f,0.f});
-    mMat=glm::rotate(mMat,float(utils::degToRad(192)),{0.f,0.f,1.f});
-    mMat=glm::translate(mMat,{0.f,2.f,0.f});
-    mMat=glm::rotate(mMat,float(utils::degToRad(270)),{0.f,1.f,0.f});
-    DrawSquarePyramid();
-
-    mMat=glm::translate(transforms.top(),{sin(currentTime*0.5)*6,sin(currentTime*0.5)*0.8-1,cos(currentTime*0.5)*6});
-    transforms.push(mMat);
-    mMat=glm::rotate(mMat,float(utils::degToRad(24)-28),{0,0,1});
-    mMat=glm::rotate(mMat,float(utils::degToRad(24)*currentTime+28),{0,1,0});
-    DrawCube();
-
-    mMat=glm::rotate(transforms.top(),utils::degToRad(90),{1,0,0});
-    mMat=glm::translate(mMat,{sin(currentTime*3)*3,0,cos(currentTime*3)*3});
-    mMat=glm::scale(mMat,{0.3,0.3,0.3});
-    mMat=glm::rotate(mMat,float(-utils::degToRad(220)*currentTime+4),{0,1,0});
-    DrawCube();
-
-    mMat=glm::rotate(transforms.top(),utils::degToRad(90),{1,1,0});
-    mMat=glm::translate(mMat,{sin(currentTime*3)*3,0,cos(currentTime*3)*3});
-    mMat=glm::scale(mMat,{0.3,0.3,0.3});
-    mMat=glm::rotate(mMat,float(utils::degToRad(120)*currentTime),{0,1,0});
-    DrawCube();
+    glUniformMatrix4fv(vLoc,1,GL_FALSE,glm::value_ptr(vMat));
+    glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat));
+    glUniform1f(timeLoc,currentTime);
+    glBindBuffer(GL_ARRAY_BUFFER,vbo[0]);
+    glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0);
+    glDrawArraysInstanced(GL_TRIANGLES,0,36,100000);
+    
+    size+=currentTime/1000;
+    glUseProgram(expandingPlaneProgram);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);  
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glfwGetFramebufferSize(window,&width,&height);
+    aspect=(float)width/(float)height;
+    pMat=glm::perspective(utils::degToRad(60),aspect,0.1f,1000.f);
+    vMat=glm::translate(glm::mat4(1.0f),glm::vec3{camera.x,camera.y,camera.z});
+
+    mMat=glm::translate(glm::mat4{1.0},{0,0,0});
+    mMat=glm::scale(mMat,{size,size,size});
+
+    mvMat=vMat*mMat;
+    
+    mvLoc=glGetUniformLocation(expandingPlaneProgram,"mv_matrix");
+    projLoc=glGetUniformLocation(expandingPlaneProgram,"proj_matrix");
+    glUniformMatrix4fv(mvLoc,1,GL_FALSE,glm::value_ptr(mvMat));
+    glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat));
+    glBindBuffer(GL_ARRAY_BUFFER,vbo[1]);
+    glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0);
+    glBindBuffer(GL_ARRAY_BUFFER,vbo[2]);
+    glVertexAttribPointer(1,2,GL_FLOAT,GL_FALSE,0,0);
+
+    glActiveTexture(GL_TEXTURE_2D);
+    glBindTexture(GL_TEXTURE_2D,cupYayTex);
+
+    glEnable(GL_DEPTH_TEST);
+    glDepthFunc(GL_LEQUAL);
+
+    glDrawArrays(GL_TRIANGLES,0,6);
 }
 
 int main(void) {

Models/utils.h

@@ -3,6 +3,7 @@
 #include <fstream>
 #include <GL/glew.h>
 #include "ShaderError.h"
+#include <SOIL2/SOIL2.h>
 
 #define PI 3.14159
 
@@ -80,4 +81,14 @@ public:
     inline static float radToDeg(float rad){
 	    return rad*57.2957795130823208767;
     }
+
+    inline static GLuint loadTexture(const char*file){
+        GLuint textureID;
+        textureID=SOIL_load_OGL_texture(file,SOIL_LOAD_AUTO,SOIL_CREATE_NEW_ID,SOIL_FLAG_INVERT_Y);
+        if(!textureID){
+            std::cout<<"Could not load texture file "<<file<<std::endl;
+            throw;
+        }
+        return textureID;
+    }
 };

Models/vertShader.glsl

@@ -1,7 +1,8 @@
 #version 430
 layout (location=0) in vec3 position;
-uniform mat4 mv_matrix;
+uniform mat4 v_matrix;
 uniform mat4 proj_matrix;
+uniform float time;
 out vec4 varyingColor;
 
 mat4 buildTranslate(float x, float y, float z);
@@ -11,6 +12,19 @@ mat4 buildRotateZ(float rad);
 
 void main(void)
 {
+    float i=time+gl_InstanceID;
+    float a = sin(203.0 * i/8000.0) * 403.0;
+    float b = cos(301.0 * i/4001.0) * 401.0;
+    float c = sin(400.0 * i/6003.0) * 405.0;
+    mat4 localRotX = buildRotateX(i);
+    mat4 localRotY = buildRotateY(i);
+    mat4 localRotZ = buildRotateZ(i);
+    mat4 localTrans = buildTranslate(a,b,c);
+
+    // build the model matrix and then the model-view matrix
+    mat4 newM_matrix = localTrans * localRotX * localRotY * localRotZ;
+    mat4 mv_matrix = v_matrix * newM_matrix;
+
 	gl_Position=proj_matrix*mv_matrix*vec4(position,1.0);
     varyingColor=vec4(position,1.0)*0.5+vec4(0.5,0.5,0.5,0.5);
 }

Models/vertShader2.glsl

@@ -0,0 +1,68 @@
+#version 430
+layout (location=0) in vec3 position;
+layout (location=1) in vec2 texCoords;
+
+uniform mat4 proj_matrix;
+uniform mat4 mv_matrix;
+
+out vec2 uv;
+
+mat4 buildTranslate(float x, float y, float z);
+mat4 buildRotateX(float rad);
+mat4 buildRotateY(float rad);
+mat4 buildRotateZ(float rad);
+
+void main(void)
+{
+	gl_Position=proj_matrix*mv_matrix*vec4(position,1.0);
+    uv=texCoords;
+}
+// builds and returns a translation matrix
+mat4 buildTranslate(float x, float y, float z)
+{ 
+    mat4 trans = mat4(1.0, 0.0, 0.0, 0.0,
+                    0.0, 1.0, 0.0, 0.0,
+                    0.0, 0.0, 1.0, 0.0,
+                    x, y, z, 1.0 );
+    return trans;
+}
+
+// builds and returns a matrix that performs a rotation around the X axis
+mat4 buildRotateX(float rad)
+{ 
+    mat4 xrot = mat4(1.0, 0.0, 0.0, 0.0,
+                    0.0, cos(rad), -sin(rad), 0.0,
+                    0.0, sin(rad), cos(rad), 0.0,
+                    0.0, 0.0, 0.0, 1.0 );
+    return xrot;
+}
+
+// builds and returns a matrix that performs a rotation around the Y axis
+mat4 buildRotateY(float rad)
+{ 
+    mat4 yrot = mat4(cos(rad), 0.0, sin(rad), 0.0,
+                    0.0, 1.0, 0.0, 0.0,
+                    -sin(rad), 0.0, cos(rad), 0.0,
+                    0.0, 0.0, 0.0, 1.0 );
+    return yrot;
+}
+
+// builds and returns a matrix that performs a rotation around the Z axis
+mat4 buildRotateZ(float rad)
+{ 
+    mat4 zrot = mat4(cos(rad), -sin(rad), 0.0, 0.0,
+                    sin(rad), cos(rad), 0.0, 0.0,
+                    0.0, 0.0, 1.0, 0.0,
+                    0.0, 0.0, 0.0, 1.0 );
+    return zrot;
+}
+
+// builds and returns a scale matrix
+mat4 buildScale(float x, float y, float z)
+{ 
+    mat4 scale = mat4(x, 0.0, 0.0, 0.0,
+                    0.0, y, 0.0, 0.0,
+                    0.0, 0.0, z, 0.0,
+                    0.0, 0.0, 0.0, 1.0 );
+    return scale;
+}

TextureMapping/fragShader.glsl

@@ -1,8 +1,7 @@
 #version 430
-layout (binding=0) uniform sampler2D samp;
 out vec4 color;
-in vec2 uv;
+in vec4 varyingColor;
 void main(void)
 {
-	color=texture(samp,uv);
+	color=varyingColor;
 }