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第一课作业 #53

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第一课作业 #53

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67 changes: 63 additions & 4 deletions src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7,15 +7,74 @@
#include <cstring>
#include <cstdlib>

static void paint_sector(int start, int end, float x, float y) {

constexpr float pi = 3.1415926535897f;
constexpr int n = 100;
float radius = 0.4f;
float inner_radius = 0.15f;

for (; start < end; ++start) {
float angle = start / (float)n * pi * 2;
float angle_next = (start + 1) / (float)n * pi * 2;
glVertex3f(radius * sinf(angle) + x, radius * cosf(angle) + y, 0.0f);
glVertex3f(radius * sinf(angle_next) + x, radius * cosf(angle_next) + y, 0.0f);
glVertex3f(inner_radius * sinf(angle) + x, inner_radius * cosf(angle) + y, 0.0f);

glVertex3f(inner_radius * sinf(angle_next) + x, inner_radius * cosf(angle_next) + y, 0.0f);
glVertex3f(inner_radius * sinf(angle) + x, inner_radius * cosf(angle) + y, 0.0f);
glVertex3f(radius * sinf(angle_next) + x, radius * cosf(angle_next) + y, 0.0f);
}
}

static void render() {
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.5f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(-0.5f, -0.5f, 0.0f);

paint_sector(60, 100, 0.0f, 0.35f);
paint_sector(0, 40, 0.0f, 0.35f);

glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(0.5f, -0.5f, 0.0f);
paint_sector(10, 50, 0.515f, -0.4f);
paint_sector(50, 90, 0.515f, -0.4f);

glColor3f(0.0f, 1.0f, 0.0f);
paint_sector(0, 10, -0.515f, -0.4f);
paint_sector(25, 100, -0.515f, -0.4f);

//for (int i = 60; i < n; ++i) {
// float angle = i / (float)n * pi * 2;
// float angle_next = (i + 1) / (float)n * pi * 2;
// glVertex3f(radius * sinf(angle), radius * cosf(angle) + 0.3, 0.0f);
// glVertex3f(radius * sinf(angle_next), radius * cosf(angle_next) + 0.3, 0.0f);
// glVertex3f(inner_radius * sinf(angle), inner_radius * cosf(angle) + 0.3, 0.0f);

// glVertex3f(inner_radius * sinf(angle_next), inner_radius * cosf(angle_next) + 0.3, 0.0f);
// glVertex3f(inner_radius * sinf(angle), inner_radius * cosf(angle) + 0.3, 0.0f);
// glVertex3f(radius * sinf(angle_next), radius * cosf(angle_next) + 0.3, 0.0f);
//}

//for (int i = 0; i < 40; ++i) {
// float angle = i / (float)n * pi * 2;
// float angle_next = (i + 1) / (float)n * pi * 2;
// glVertex3f(radius * sinf(angle), radius * cosf(angle) + 0.3, 0.0f);
// glVertex3f(radius * sinf(angle_next), radius * cosf(angle_next) + 0.3, 0.0f);
// glVertex3f(inner_radius * sinf(angle), inner_radius * cosf(angle) + 0.3, 0.0f);

// glVertex3f(inner_radius * sinf(angle_next), inner_radius * cosf(angle_next) + 0.3, 0.0f);
// glVertex3f(inner_radius * sinf(angle), inner_radius * cosf(angle) + 0.3, 0.0f);
// glVertex3f(radius * sinf(angle_next), radius * cosf(angle_next) + 0.3, 0.0f);
//}

CHECK_GL(glEnd());
//glBegin(GL_TRIANGLES);
//glColor3f(1.0f, 0.0f, 0.0f);
//glVertex3f(0.0f, 0.5f, 0.0f);
//glColor3f(0.0f, 1.0f, 0.0f);
//glVertex3f(-0.5f, -0.5f, 0.0f);
//glColor3f(0.0f, 0.0f, 1.0f);
//glVertex3f(0.5f, -0.5f, 0.0f);
//CHECK_GL(glEnd());
/* glBegin(GL_TRIANGLES); */
/* constexpr int n = 100; */
/* constexpr float pi = 3.1415926535897f; */
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