From c29a911cd1a3f23f66478f205cace14487aadc56 Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <mattkae@protonmail.com>
Date: Wed, 17 Mar 2021 23:10:55 -0400
Subject: Beginning to build out the orthographic renderer, and updated styles

---
 frontend/_wasm/wasm.cpp | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

(limited to 'frontend/_wasm/wasm.cpp')

diff --git a/frontend/_wasm/wasm.cpp b/frontend/_wasm/wasm.cpp
index 8673c80..254a5e2 100644
--- a/frontend/_wasm/wasm.cpp
+++ b/frontend/_wasm/wasm.cpp
@@ -29,6 +29,7 @@ const char* orthographicFragment =
 "    gl_FragColor = VertexColor; \n"
 "}";
 
+
 struct OrthographicProgramData {
     GLuint shader;
 
@@ -52,6 +53,7 @@ struct OrthographicVertex {
 struct TriangleObject {
     OrthographicVertex vertices[3];
 	Vector2 velocity;
+	Vector2 position;
     GLuint mVao;
     GLuint mVbo;
     Mat4x4 model;
@@ -66,10 +68,6 @@ struct TriangleObject {
         glBindBuffer(GL_ARRAY_BUFFER, mVbo);
         glBufferData(GL_ARRAY_BUFFER, 3 * sizeof(OrthographicVertex), &vertices[0], GL_STATIC_DRAW);
 
-        for (int idx = 0; idx < 3; idx++) {
-            printf("%f, %f\n", vertices[idx].position.x, vertices[idx].position.y);
-        }
-
         glEnableVertexAttribArray(programData->attributes.position);
         glVertexAttribPointer(programData->attributes.position, 2, GL_FLOAT, GL_FALSE, sizeof(OrthographicVertex), (GLvoid *)0);
 
@@ -144,6 +142,7 @@ int main() {
 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");
@@ -151,14 +150,17 @@ EM_BOOL runScene(int eventType, const EmscriptenMouseEvent* mouseEvent, void* us
 
 	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.vertices[0] = { Vector2 { 220, 365 }, Vector4 { 1.f, 0.f, 0.f, 1.f }};
-    scene.triangleObject.vertices[1] = { Vector2 { 320, 480 }, Vector4 { 0.f, 1.f, 0.f, 1.f }};
-    scene.triangleObject.vertices[2] = { Vector2 { 420, 365 }, Vector4 { 0.f, 0.f, 1.f, 1.f }};
+	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);
@@ -195,7 +197,8 @@ EM_BOOL update(double time, void* userData) {
 
 	// Update
     scene->triangleObject.velocity = scene->triangleObject.velocity + Vector2 { 0, static_cast<float>(-9.8 * deltaTimeSeconds) };
-	scene->triangleObject.model = scene->triangleObject.model.translateByVec2(scene->triangleObject.velocity * deltaTimeSeconds);
+	scene->triangleObject.position = scene->triangleObject.position + scene->triangleObject.velocity * deltaTimeSeconds;
+	scene->triangleObject.model = Mat4x4().translateByVec2(scene->triangleObject.position);
 
 	// Render
 	glEnable(GL_DEPTH_TEST);
@@ -213,5 +216,8 @@ EM_BOOL update(double time, void* userData) {
 
 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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