init

2024-09-22 22:11:28 -05:00
commit 2d257839c3
@@ -0,0 +1,133 @@
+package org.example;
+
+import org.lwjgl.*;
+import org.lwjgl.Version;
+import org.lwjgl.glfw.*;
+import org.lwjgl.opengl.*;
+import org.lwjgl.system.*;
+
+import java.nio.*;
+import java.io.*;
+import java.text.MessageFormat;
+
+import static org.lwjgl.glfw.Callbacks.*;
+import static org.lwjgl.glfw.GLFW.*;
+import static org.lwjgl.opengl.GL11.*;
+import static org.lwjgl.system.MemoryStack.*;
+import static org.lwjgl.system.MemoryUtil.*;
+
+import com.mokiat.data.front.parser.*;
+import org.lwjgl.system.MemoryStack;
+
+public class Game
+{
+    private long window;
+
+    public void run()
+    {
+        System.out.println("Running LWJGL Version " + Version.getVersion() + ".");
+
+        init();
+        loop();
+
+        // Free the window callbacks and destroy the window
+        glfwFreeCallbacks(window);
+        glfwDestroyWindow(window);
+
+        // Terminate GLFW and free the error callback
+        glfwTerminate();
+        glfwSetErrorCallback(null).free();
+    }
+
+    public void init()
+    {
+        GLFWErrorCallback.createPrint(System.err).set();
+
+        if (!glfwInit())
+            throw new IllegalStateException("Unable to Initialize GLFW");
+
+        // Configure GLFW
+        glfwDefaultWindowHints(); // optional, the current window hints are already the default
+        glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE); // the window will stay hidden after creation
+        glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE); // the window will be resizable
+
+        // Create the window
+        window = glfwCreateWindow(300, 300, "Hello World!", NULL, NULL);
+        if ( window == NULL )
+            throw new RuntimeException("Failed to create the GLFW window");
+
+        // Setup a key callback. It will be called every time a key is pressed, repeated or released.
+        glfwSetKeyCallback(window, (window, key, scancode, action, mods) -> {
+            if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )
+                glfwSetWindowShouldClose(window, true); // We will detect this in the rendering loop
+        });
+
+        // Get the thread stack and push a new frame
+        try ( MemoryStack stack = stackPush() ) {
+            IntBuffer pWidth = stack.mallocInt(1); // int*
+            IntBuffer pHeight = stack.mallocInt(1); // int*
+
+            // Get the window size passed to glfwCreateWindow
+            glfwGetWindowSize(window, pWidth, pHeight);
+
+            // Get the resolution of the primary monitor
+            GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
+
+            // Center the window
+            glfwSetWindowPos(
+                    window,
+                    (vidmode.width() - pWidth.get(0)) / 2,
+                    (vidmode.height() - pHeight.get(0)) / 2
+            );
+        } // the stack frame is popped automatically
+
+        // Make the OpenGL context current
+        glfwMakeContextCurrent(window);
+        // Enable v-sync
+        glfwSwapInterval(1);
+
+        // Make the window visible
+        glfwShowWindow(window);
+
+        // Load Objects
+        try (InputStream in = this.getClass().getResourceAsStream("/objs/cube.obj")) {
+            // Create an OBJParser and parse the resource
+            final IOBJParser parser = new OBJParser();
+            final OBJModel model = parser.parse(in);
+
+            // Use the model representation to get some basic info
+            System.out.println(MessageFormat.format(
+                    "OBJ model has {0} vertices, {1} normals, {2} texture coordinates, and {3} objects.",
+                    model.getVertices().size(),
+                    model.getNormals().size(),
+                    model.getTexCoords().size(),
+                    model.getObjects().size()));
+        } catch (Exception e) {
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private void loop()
+    {
+        GL.createCapabilities();
+
+        glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+
+        while ( !glfwWindowShouldClose(window) )
+        {
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+            glfwSwapBuffers(window);
+
+            glfwPollEvents();
+        }
+    }
+
+    public static void main(String[] args)
+    {
+        new Game().run();
+    }
+
+
+}
@@ -0,0 +1,80 @@
+package org.example;
+
+import static org.lwjgl.opengl.GL20.*;
+
+public class ShaderProgram {
+
+    private final int programId;
+
+    private int vertexShaderId;
+
+    private int fragmentShaderId;
+
+    public ShaderProgram() throws Exception {
+        programId = glCreateProgram();
+        if (programId == 0) {
+            throw new Exception("Could not create Shader");
+        }
+    }
+
+    public void createVertexShader(String shaderCode) throws Exception {
+        vertexShaderId = createShader(shaderCode, GL_VERTEX_SHADER);
+    }
+
+    public void createFragmentShader(String shaderCode) throws Exception {
+        fragmentShaderId = createShader(shaderCode, GL_FRAGMENT_SHADER);
+    }
+
+    protected int createShader(String shaderCode, int shaderType) throws Exception {
+        int shaderId = glCreateShader(shaderType);
+        if (shaderId == 0) {
+            throw new Exception("Error creating shader. Type: " + shaderType);
+        }
+
+        glShaderSource(shaderId, shaderCode);
+        glCompileShader(shaderId);
+
+        if (glGetShaderi(shaderId, GL_COMPILE_STATUS) == 0) {
+            throw new Exception("Error compiling Shader code: " + glGetShaderInfoLog(shaderId, 1024));
+        }
+
+        glAttachShader(programId, shaderId);
+
+        return shaderId;
+    }
+
+    public void link() throws Exception {
+        glLinkProgram(programId);
+        if (glGetProgrami(programId, GL_LINK_STATUS) == 0) {
+            throw new Exception("Error linking Shader code: " + glGetProgramInfoLog(programId, 1024));
+        }
+
+        if (vertexShaderId != 0) {
+            glDetachShader(programId, vertexShaderId);
+        }
+        if (fragmentShaderId != 0) {
+            glDetachShader(programId, fragmentShaderId);
+        }
+
+        glValidateProgram(programId);
+        if (glGetProgrami(programId, GL_VALIDATE_STATUS) == 0) {
+            System.err.println("Warning validating Shader code: " + glGetProgramInfoLog(programId, 1024));
+        }
+
+    }
+
+    public void bind() {
+        glUseProgram(programId);
+    }
+
+    public void unbind() {
+        glUseProgram(0);
+    }
+
+    public void cleanup() {
+        unbind();
+        if (programId != 0) {
+            glDeleteProgram(programId);
+        }
+    }
+}
@@ -0,0 +1,221 @@
+# Blender v2.79 (sub 0) OBJ File: 'axis.blend'
+# www.blender.org
+v -11.748000 -0.360000 1.268000
+v -11.276000 -0.360000 1.268000
+v -10.424000 -0.360000 0.228000
+v -9.568000 -0.360000 1.268000
+v -9.092000 -0.360000 1.268000
+v -10.184000 -0.360000 -0.048000
+v -9.008000 -0.360000 -1.460000
+v -9.484000 -0.360000 -1.460000
+v -10.424000 -0.360000 -0.332000
+v -11.352000 -0.360000 -1.460000
+v -11.824000 -0.360000 -1.460000
+v -10.660000 -0.360000 -0.048000
+v -9.484000 0.373033 -1.460000
+v -10.424000 0.373033 -0.332000
+v -11.748000 0.373033 1.268000
+v -10.660000 0.373033 -0.048000
+v -9.568000 0.373033 1.268000
+v -10.184000 0.373033 -0.048000
+v -11.824000 0.373033 -1.460000
+v -9.008000 0.373033 -1.460000
+v -10.424000 0.373033 0.228000
+v -11.352000 0.373033 -1.460000
+v -9.092000 0.373033 1.268000
+v -11.276000 0.373033 1.268000
+v -0.620000 -0.380000 11.376000
+v 1.116000 -0.380000 9.000000
+v -1.344000 -0.380000 9.000000
+v -1.344000 -0.380000 9.352000
+v 0.392000 -0.380000 9.352000
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+v 1.008000 -0.380000 11.728000
+v 1.008000 -0.380000 11.376000
+v 0.392000 0.384923 9.352000
+v -1.344000 0.384923 11.728000
+v -0.620000 0.384923 11.376000
+v -1.344000 0.384923 9.352000
+v 1.116000 0.384923 9.000000
+v 1.008000 0.384923 11.728000
+v 1.008000 0.384923 11.376000
+v -1.344000 0.384923 9.000000
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+v 0.304321 11.728000 -1.100000
+v 0.304321 11.728000 0.844000
+v 0.500000 -0.500000 -0.500000
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+v 0.500000 0.500000 0.500000
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+v 0.500000 -0.500000 8.500000
+v -0.500000 -0.500000 8.500000
+v -0.500000 0.500000 8.500000
+s off
+f 6 5 4
+f 6 4 3
+f 3 2 1
+f 3 1 12
+f 6 3 12
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+f 7 12 9
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@@ -0,0 +1,30 @@
+# Blender 4.1.1
+# www.blender.org
+o Cube
+v 1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 1.000000
+v -1.000000 1.000000 -1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 1.000000
+vn -0.0000 1.0000 -0.0000
+vn -0.0000 -0.0000 1.0000
+vn -1.0000 -0.0000 -0.0000
+vn -0.0000 -1.0000 -0.0000
+vn 1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 -1.0000
+s 0
+f 5//1 3//1 1//1
+f 3//2 8//2 4//2
+f 7//3 6//3 8//3
+f 2//4 8//4 6//4
+f 1//5 4//5 2//5
+f 5//6 2//6 6//6
+f 5//1 7//1 3//1
+f 3//2 7//2 8//2
+f 7//3 5//3 6//3
+f 2//4 4//4 8//4
+f 1//5 3//5 4//5
+f 5//6 1//6 2//6
@@ -0,0 +1,18 @@
+# Blender 4.1.1
+# www.blender.org
+mtllib tetrahedron.mtl
+o Tetrahedron
+v 0.589834 1.455189 -0.731109
+v -0.654905 0.362953 1.561846
+v -1.236534 -0.687860 -0.998915
+v 1.301606 -1.130282 0.168178
+vn -0.3405 -0.8402 0.4221
+vn -0.7515 0.6526 -0.0971
+vn 0.7139 0.3971 0.5767
+vn 0.3781 -0.2096 -0.9017
+s 0
+usemtl 
+f 3//1 4//1 2//1
+f 2//2 1//2 3//2
+f 1//3 2//3 4//3
+f 1//4 4//4 3//4
@@ -0,0 +1,52 @@
+#version 330 core
+out vec4 FragColor;
+
+
+uniform float light_power;
+uniform vec3 lightColor;
+uniform vec3 objectColor;
+uniform vec3 viewPos;
+
+in vec3 FragPos;
+in vec3 Normal;
+in vec3 LightPos;
+
+// const float light_power = 12.0;
+const float ambientStrength = 0.2;
+const float shininess = 64.0;
+const float screenGamma = 2.2; // Assume the monitor is calibrated to the sRGB color space
+
+void main()
+{
+    // FragColor = vec4(1.0f, 0.0f, 0.0f, 1.0f);
+
+    vec3 lightDir = LightPos - FragPos;
+    float distance = length(lightDir);
+    vec3 norm = normalize(Normal);
+    vec3 ambient = ambientStrength * lightColor;
+
+    distance = distance * distance;
+    lightDir = normalize(lightDir);
+
+    float lambertian = max(dot(norm, lightDir), 0.0);
+    vec3 diffuse = lambertian * lightColor;
+    float specular = 0.0;
+
+    if (lambertian > 0.0)
+    {
+        vec3 viewDir = normalize(-FragPos);
+
+        vec3 halfDir = normalize(lightDir + viewDir);
+        float specAngle = max(dot(halfDir, norm), 0.0);
+        specular = pow(specAngle, shininess);
+    }
+
+    vec3 colorLinear = (ambient + (diffuse * light_power) + (specular * light_power)) * objectColor;
+
+    // vec3 colorGammaCorrected = pow(colorLinear, vec3(1.0 / screenGamma));
+
+    FragColor = vec4(colorLinear, 1.0);
+
+    // vec3 norm = normalize(Normal);
+}
+
@@ -0,0 +1,22 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+//layout (location = 1) in vec3 aColor;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+uniform vec3 lightPos;
+
+out vec3 FragPos;
+out vec3 Normal;
+out vec3 LightPos;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    FragPos = vec3(view * model * vec4(aPos, 1.0));
+    Normal = mat3(transpose(inverse(view * model))) * aNormal;
+    LightPos = vec3(view * vec4(lightPos, 1.0));
+}
+
@@ -0,0 +1,11 @@
+#version 330 core
+out vec4 FragColor;
+
+uniform vec3 lightColor;
+
+void main()
+{
+    FragColor = vec4(lightColor, 1.0);
+}
+
+
@@ -0,0 +1,15 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
+}
+
+
+