From 9cf523fb6c1d2299b674478b537dc642ea7e6c5b Mon Sep 17 00:00:00 2001
From: MrFloor <mr.chloor@gmail.com>
Date: Fri, 27 May 2022 00:05:18 +0200
Subject: [PATCH] Hehehehe it still doesn't work

---
 src/Renderer.c |  6 ++++++
 src/Renderer.h |  2 ++
 src/lorenz.c   | 42 +++++++++++++++++++++++++-----------------
 src/utils.c    | 14 ++++++++++++++
 src/utils.h    |  8 ++++++++
 5 files changed, 55 insertions(+), 17 deletions(-)
 create mode 100644 src/utils.c
 create mode 100644 src/utils.h

diff --git a/src/Renderer.c b/src/Renderer.c
index fc61075..62953b4 100644
--- a/src/Renderer.c
+++ b/src/Renderer.c
@@ -152,4 +152,10 @@ unsigned int createTexture(char* path){
 	return texture;
 }
 
+void buffercpy(int VBO, void* ptr, int size){
+	glBindBuffer(GL_ARRAY_BUFFER, VBO);
+	void* buffer = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
+	memcpy(buffer, ptr, size);
+	glUnmapBuffer(GL_ARRAY_BUFFER);
+}
 
diff --git a/src/Renderer.h b/src/Renderer.h
index 2c512e2..1a479e4 100644
--- a/src/Renderer.h
+++ b/src/Renderer.h
@@ -20,4 +20,6 @@ unsigned int createShader(char* vertexPath, char* fragmentPath);
 
 unsigned int createTexture(char* path);
 
+
+void buffercpy(int VBO, void* ptr, int size);
 #endif
diff --git a/src/lorenz.c b/src/lorenz.c
index bc16706..441903f 100644
--- a/src/lorenz.c
+++ b/src/lorenz.c
@@ -7,6 +7,7 @@
 #include <linmath.h>
 #include "Renderer.h"
 #include "Input.h"
+#include "utils.h"
 
 float pos[3] = {0.0f, 0.0f, 0.0f};
 
@@ -29,6 +30,7 @@ void lorenzStep(float next[3], vec3 prev, float dt) {
 }
 
 int main(int argc, char *argv[]) {
+
 	GLFWwindow* window = initOpenGL();
 	glfwSetKeyCallback(window, &key_pressed);
 	
@@ -42,7 +44,7 @@ int main(int argc, char *argv[]) {
 		
 	glBindVertexArray(VAO);
 	glBindBuffer(GL_ARRAY_BUFFER, VBO);
-	glBufferData(GL_ARRAY_BUFFER, 10* sizeof(vec3), NULL, GL_STREAM_DRAW);
+	glBufferData(GL_ARRAY_BUFFER, 100* sizeof(vec3), NULL, GL_STREAM_DRAW);
 	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0 );
 	glEnableVertexAttribArray(0);
 
@@ -52,39 +54,44 @@ int main(int argc, char *argv[]) {
 	mat4x4_ortho(proj, 0.0, 400.0, 0.0, 400.0, 0.1, 100.0);
 
 	glUseProgram(shader1);
-	int projLoc = glGetUniformLocation(shader1, "proj");
+	//int projLoc = glGetUniformLocation(shader1, "proj");
 	//glUniformMatrix4fv(projLoc, 1, GL_FALSE, *proj);
 	
 	// PointsArray
 	vec3* lorenzPoints = malloc(3000 * sizeof(vec3));
 	memset(lorenzPoints, 0, 3000 * sizeof(vec3));
-	vec3 initial = {0.1f, 0.1f, 0.1f};
-	memcpy(lorenzPoints, initial, sizeof(vec3));
-	vec3 sec = {0.2f, 0.2f, 0.2f};
-	memcpy(lorenzPoints[1] , sec, sizeof(vec3));
+	vec3 initial[] = {{0.1f, 0.1f, 0.1f},{
+					   0.2f, 0.7f, 0.7f	}};
+	memcpy(lorenzPoints, initial, 2 * sizeof(vec3));
+	int i = 2;
+	for (i=2; i<10; i++){
+		vec3 next;
+		lorenzStep(next, lorenzPoints[i-1], 0.01);
 
-	for (int i=2; i<10; i++){
-		float inc = 0.1 * (float)i;
-		vec3 next = {inc, inc, inc};
 		memcpy(lorenzPoints[i], next, sizeof(vec3));
+		//printf("%f, %f\n", lorenzPoints[i][0], lorenzPoints[i][1]);
 	}
 	
-	float* buffer = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
-	memcpy(buffer, lorenzPoints, 10 * sizeof(vec3));
-	glUnmapBuffer(GL_ARRAY_BUFFER);
+	vec3* mapped = malloc(3000 * sizeof(vec3));
+	memset(mapped, 0, 3000 * sizeof(vec3));
+	for(int j=0; j>=i; j++){
+		mapped[j][0] = remap( -20.0f, 20.0f, -1.0f, 1.0f, lorenzPoints[j][0]);
+		mapped[j][1] = remap( -20.0f, 20.0f, -1.0f, 1.0f, lorenzPoints[j][1]);
+		mapped[j][2] = remap( -20.0f, 20.0f, -1.0f, 1.0f, lorenzPoints[j][2]);
+
+	}
+	printf("%f \n", mapped[0][0]);
+
+	buffercpy(VBO, lorenzPoints, sizeof(vec3) * 100);
 
-	int i=1;
 	while(!glfwWindowShouldClose(window)) {
 		glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		glUseProgram(shader1);
 		
-		i++;
-		if(i>10)
-			i=1;
 
 
-		glDrawArrays(GL_LINE_STRIP, 0, i);
+		glDrawArrays(GL_LINE_STRIP, 0, 10);
 		glfwSwapBuffers(window);
 		glfwPollEvents();
 		processInput();
@@ -93,6 +100,7 @@ int main(int argc, char *argv[]) {
 	glDeleteVertexArrays(1, &VAO);
 	glDeleteBuffers(1, &VBO);
 	free(lorenzPoints);
+	free(mapped);
 	glfwTerminate();
 	return 0;
 }
diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..ad5948c
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,14 @@
+#include "utils.h"
+
+float lerp(float a, float b, float t) {
+	return (1.0f - t) * a + b * t;	
+}
+
+float invLerp(float a, float b, float v){
+	return (v - a) / (b - a);
+}
+
+float remap(float a, float b, float A, float B, float value) {
+	float t = invLerp(a,b,value);
+	return lerp(A,B,t);
+} 
diff --git a/src/utils.h b/src/utils.h
new file mode 100644
index 0000000..7cc0d23
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,8 @@
+#ifndef UTILS
+#define UTILS
+
+float lerp(float a, float b, float t);
+float invLerp(float a, float b, float value);
+float remap(float a,float b, float A, float B, float value);
+
+#endif