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-rw-r--r--frontend/_wasm/intro/intro.cpp223
1 files changed, 0 insertions, 223 deletions
diff --git a/frontend/_wasm/intro/intro.cpp b/frontend/_wasm/intro/intro.cpp
deleted file mode 100644
index 63c80ef..0000000
--- a/frontend/_wasm/intro/intro.cpp
+++ /dev/null
@@ -1,223 +0,0 @@
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <sys/time.h>
-#include <emscripten.h>
-#include <emscripten/html5.h>
-#include <GLES2/gl2.h>
-#include <EGL/egl.h>
-
-#include "mathlib.h"
-#include "Shader.h"
-
-// Shader code inlined
-const char* orthographicVertex =
-"attribute vec2 position; \n"
-"attribute vec4 color; \n"
-"uniform mat4 projection; \n"
-"uniform mat4 model; \n"
-"varying lowp vec4 VertexColor; \n"
-"void main() { \n"
-" vec4 fragmentPosition = projection * model * vec4(position, 1, 1); \n"
-" gl_Position = fragmentPosition; \n"
-" VertexColor = color; \n"
-"}";
-
-const char* orthographicFragment =
-"varying lowp vec4 VertexColor; \n"
-"void main() { \n"
-" gl_FragColor = VertexColor; \n"
-"}";
-
-
-struct OrthographicProgramData {
- GLuint shader;
-
- struct {
- int position;
- int color;
- } attributes;
-
- struct {
- int projection;
- int model;
- } uniformVariables;
-};
-
-struct OrthographicVertex {
- Vector2 position;
- Vector4 color;
-};
-
-// Create a triangle
-struct TriangleObject {
- OrthographicVertex vertices[3];
- Vector2 velocity;
- Vector2 position;
- GLuint mVao;
- GLuint mVbo;
- Mat4x4 model;
-
- void initialize(OrthographicProgramData* programData) {
- useShader(programData->shader);
-
- glGenVertexArrays(1, &mVao);
- glBindVertexArray(mVao);
-
- glGenBuffers(1, &mVbo);
- glBindBuffer(GL_ARRAY_BUFFER, mVbo);
- glBufferData(GL_ARRAY_BUFFER, 3 * sizeof(OrthographicVertex), &vertices[0], GL_STATIC_DRAW);
-
- glEnableVertexAttribArray(programData->attributes.position);
- glVertexAttribPointer(programData->attributes.position, 2, GL_FLOAT, GL_FALSE, sizeof(OrthographicVertex), (GLvoid *)0);
-
- glEnableVertexAttribArray(programData->attributes.color);
- glVertexAttribPointer(programData->attributes.color, 4, GL_FLOAT, GL_FALSE, sizeof(OrthographicVertex), (GLvoid *)offsetof(OrthographicVertex, color));
-
- glBindBuffer(GL_ARRAY_BUFFER, 0);
- glBindVertexArray(0);
- }
-
- void render(OrthographicProgramData* programData) {
- setShaderMat4(programData->uniformVariables.model, model);
-
- glBindVertexArray(mVao);
- glDrawArrays(GL_TRIANGLES, 0, 3);
- glBindVertexArray(0);
- }
-
-};
-
-struct Scene {
- Mat4x4 projection;
- TriangleObject triangleObject;
- OrthographicProgramData programData;
- bool isTerminated = false;
-};
-
-long long timeInMilliseconds(void) {
- struct timeval tv;
-
- gettimeofday(&tv,NULL);
- return (((long long)tv.tv_sec)*1000)+(tv.tv_usec/1000);
-}
-
-long elapsedTime = 0;
-long lastTime = 0;
-int numFrames = 0;
-
-EM_BOOL update(double time, void* userData);
-EM_BOOL runScene(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
-EM_BOOL terminateScene(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
-
-int main() {
- printf("Initializing the canvas...\n");
- emscripten_set_canvas_element_size( "#wasm_canvas", 640, 480 );
-
- EmscriptenWebGLContextAttributes attrs;
- emscripten_webgl_init_context_attributes(&attrs);
-
- attrs.enableExtensionsByDefault = 1;
- attrs.majorVersion = 3;
- attrs.minorVersion = 0;
-
- EMSCRIPTEN_WEBGL_CONTEXT_HANDLE context = emscripten_webgl_create_context( "#wasm_canvas", &attrs );
-
- if (!context)
- {
- attrs.majorVersion = 1;
- context = emscripten_webgl_create_context( "#wasm_canvas", &attrs );
- if (context) printf("Skipping test: WebGL 3.0 is not available.\n");
- else printf("Test failed: WebGL is not available!\n");
- return 0;
- }
- emscripten_webgl_make_context_current(context);
- printf("Canvas ready.\n");
-
- emscripten_set_click_callback("#wasm_canvas_play_button", NULL, false, runScene);
- emscripten_set_click_callback("#wasm_canvas_stop_button", NULL, false, terminateScene);
- return EXIT_SUCCESS;
-}
-
-Scene scene;
-
-EM_BOOL runScene(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData) {
- scene.programData = OrthographicProgramData();
- printf("Compiling shaders...\n");
- scene.programData.shader = loadShader(orthographicVertex, orthographicFragment);
- printf("Shaders compiled.\n");
-
-
- printf("Initializing scene...\n");
- useShader(scene.programData.shader);
-
- scene.programData.attributes.position = getShaderAttribute(scene.programData.shader, "position");
- scene.programData.attributes.color = getShaderAttribute(scene.programData.shader, "color");
- scene.programData.uniformVariables.projection = getShaderUniform(scene.programData.shader, "projection");
- scene.programData.uniformVariables.model = getShaderUniform(scene.programData.shader, "model");
-
- scene.triangleObject = TriangleObject();
- scene.triangleObject.vertices[0] = { Vector2 { -100, -50 }, Vector4 { 1.f, 0.f, 0.f, 1.f }};
- scene.triangleObject.vertices[1] = { Vector2 { 0, 50 }, Vector4 { 0.f, 1.f, 0.f, 1.f }};
- scene.triangleObject.vertices[2] = { Vector2 { 100, -50 }, Vector4 { 0.f, 0.f, 1.f, 1.f }};
- scene.triangleObject.position = { 320.f, 480.f - 100.f };
- scene.triangleObject.initialize(&scene.programData);
-
- scene.projection = Mat4x4().getOrthographicMatrix(0, 640, 0, 480);
- scene.isTerminated = false;
- printf("Scene initialized.\n");
-
- emscripten_request_animation_frame_loop(update, &scene);
- return true;
-}
-
-EM_BOOL update(double time, void* userData) {
- Scene* scene = (Scene*)userData;
- if (scene->isTerminated) {
- return false;
- }
-
- if (lastTime == 0) {
- lastTime = time;
- return true;
- }
-
- long deltaTime = time - lastTime;
- lastTime = time;
- elapsedTime += deltaTime;
- numFrames++;
-
- if (elapsedTime >= 1000.0) {
- printf("Frames Per Second: %d\n", numFrames);
- numFrames = 0;
- elapsedTime = 0.0;
- }
-
- float deltaTimeSeconds = static_cast<float>(deltaTime) / 1000.f;
-
- // Update
- scene->triangleObject.velocity = scene->triangleObject.velocity + Vector2 { 0, static_cast<float>(-9.8 * deltaTimeSeconds) };
- scene->triangleObject.position = scene->triangleObject.position + scene->triangleObject.velocity * deltaTimeSeconds;
- scene->triangleObject.model = Mat4x4().translateByVec2(scene->triangleObject.position);
-
- // Render
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LEQUAL);
- glDepthMask(GL_TRUE);
- glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
- glClearDepth(1.0f);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
- useShader(scene->programData.shader);
- setShaderMat4(scene->programData.uniformVariables.projection, scene->projection);
- scene->triangleObject.render(&scene->programData);
-
- return true;
-}
-
-EM_BOOL terminateScene(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData) {
- scene.isTerminated = true;
- glDeleteVertexArrays(1, &scene.triangleObject.mVao);
- glDeleteBuffers(1, &scene.triangleObject.mVbo);
- glDeleteProgram(scene.programData.shader);
- return true;
-}
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